期刊：
Journal of Manufacturing Processes,2023年101:795-806 ISSN：1526-6125
通讯作者：
Cui, JJ
作者机构：
[Li, Guangyao; Cui, JJ; Zhu, Jiapei; Cui, Junjia; Chen, Chang; Jiang, Hao; Liu, Quanxiaoxiao] Hunan Univ, State Key Lab Adv Design & Mfg Technol Vehicle, Changsha 410082, Peoples R China.;[Chen, Chang] Hunan City Univ, Sch Mech & Elect Engn, Yiyang 413000, Peoples R China.;[Li, Guangyao] Beijing Inst Technol, Shenzhen Automot Res Inst, Shenzhen Res Inst, Natl Engn Lab Elect Vehicles, Shenzhen 518118, Peoples R China.
通讯机构：
[Cui, JJ ] H;Hunan Univ, State Key Lab Adv Design & Mfg Technol Vehicle, Changsha 410082, Peoples R China.
关键词：
Magnetic pulse spot welding;Aluminium alloy sheet;Mechanical property;Micro-morphology
摘要：
Magnetic pulse spot welding (MPSW) is a safe, efficient and environmentally friendly process, which is very suitable for joining aluminium alloys. AA5052 aluminium alloy sheets were joined by MPSW. Specifically, the bump on the flyer plate was driven to impact the parent plate at high velocity to achieve metallurgical bonding. The formation process, mechanical properties and micro-morphology of the joint were studied. The results showed that the bump of the flyer plate impacted the parent plate at high velocity caused by Lorentz force to form welding seam. The shape of the welding seam was two incompletely continuous symmetrical elliptical arcs due to the different welding velocities and welding angles in each zone. The strength of the joint was higher than that of the base metal at appropriate process parameters. Specifically, the relatively better process parameters were welding gap of 1.4 mm, welding diameter of 16 mm and discharge energy of 36 kJ. The maximum loads of tensile shear and cross-tension were 4887 N, 1744 N. There were a large amount of dimples at the fracture of welding seam, and the toughness of joint was good.
期刊：
Journal of Materials Research and Technology,2023年23:5181-5192 ISSN：2238-7854
通讯作者：
Hongbo Xia<&wdkj&>Yunwu Ma
作者机构：
[Wang, Qinghang; Wang, Li; Xia, Hongbo; Chen, Shuai; Zhai, Haowei] Yangzhou Univ, Sch Mech Engn, Yangzhou 225127, Peoples R China.;[Wang, Qinghang; Huang, Lixin] CIT Dicastal Co Ltd, Qinhuangdao 066000, Peoples R China.;[Zhao, Jun] Hunan City Univ, Sch Mech & Elect Engn, Yiyang 413002, Peoples R China.;[Ma, Yunwu] Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai Key Lab Digital Manufacture Thin Walled S, Shanghai 200240, Peoples R China.;[Ma, Yunwu] Shanghai Jiao Tong Univ, Sch Mech Engn, State Key Lab Mech Syst & Vibrat, Shanghai 200240, Peoples R China.
通讯机构：
[Hongbo Xia; Yunwu Ma] S;School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China<&wdkj&>Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China<&wdkj&>State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
摘要：
Friction stir welding (FSW) is a new solid-state joining process for joining light metals, such as magnesium (Mg) alloys. However, the texture-induced softening mechanism (in stir zone, SZ) tends to cause the worsening of mechanical properties in FSW Mg alloys. In this work, multi-pass hot-rolling and subsequent annealing is used to ameliorate the FSW AZ31 alloy plate. The results show that multi-pass hot-rolling leads to the c-axes of most grains in the SZ approximately perpendicular to the normal direction (ND) transforming into these almost parallel to the ND, accompanied with multiple twin types. After subsequent annealing, twins, as nucleation sites, promote the formation of new grains with off-basal texture, resulting in the weak basal texture. Compared with the FSW plate and the initial plate, the rolled-annealed FSW plate exhibits a relatively uniform hardness distribution and a "strength-ductility" synergy, which are mainly attributed to an appropriate texture feature and a homogeneous grain structure. This work provides a new idea for the development of new high-performance FSW Mg alloys. (c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC
摘要：
Transverse gradient extrusion (TGE) processes with different die inclined angles of 15 degrees, 30 degrees, 45 degrees and 60 degrees were used to produce Mg-3Al-1Zn sheets, thereby tailoring texture and mechanical properties of Mg alloy sheets. Microstructure, deformation texture and final mechanical properties of the obtained sheets were detected and discussed. Furthermore, the rheological behavior of Mg alloys during extrusion was analyzed by finite element method. As the TGE die inclined angle changed, the flow velocity along the transverse direction (TD) and effective strain difference along extrusion direction (ED) were changed during extrusion, and therefore the microstructure and texture of extruded sheets are altered. With increase of TGE die inclined angles, fine grain size and uniform microstructure were obtained. The base poles of most grains for the extruded sheets gradually deviate from normal direction (ND) to ED at center region and inclined from ED to TD at 1/4 edge region. A large elongation of 33.9 % and a low yield stress of 125 MPa can be obtained in the TGE-45 sheet.
作者机构：
[Wang, Qinghang; Jiang, Bin; Gao, Yuyang] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China.;[Wang, Qinghang; Wang, Li; Zhai, Haowei] Yangzhou Univ, Sch Mech Engn, Yangzhou 225127, Peoples R China.;[Wang, Qinghang; Huang, Lixin] CIT Dicastal Co Ltd, Qinhuangdao 066000, Peoples R China.;[Zhao, Jun] Hunan City Univ, Sch Mech & Elect Engn, Yiyang 413002, Peoples R China.
通讯机构：
[Yuyang Gao; Bin Jiang] C;College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China<&wdkj&>Authors to whom correspondence should be addressed.
摘要：
In this work, we investigate the impact of Bi addition on the heat resistance of as-extruded AZ31 alloy during high-temperature annealing and hot compression. Electron backscattered diffraction (EBSD) technique and quasi in situ scanning electron microscopy (SEM) are used to analyze the evolution of microstructures during high-temperature annealing and hot compression, respectively. The test results show that with a prolonged annealing time, the as-extruded AZB313 alloy exhibited a lower grain growth rate, due to the pinning effect of Mg3Bi2 phases distributed at grain boundaries. On the other hand, as the compressive temperature increased, the downtrend of strength is delayed in the as-extruded AZB313 alloy. Thermally stable Mg3Bi2 phases dispersed within the grains act as barriers, hindering the motion of dislocations, which not only provides a more effective precipitation strengthening effect, but also increases the resistance to deformation of grains. Moreover, grain boundary sliding can also be restricted by Mg3Bi2 phases located at grain boundaries. This work provides a new idea for the development of heat-resistant wrought Mg alloys.
期刊：
Biomass Conversion and Biorefinery,2023年13(5):3659-3667 ISSN：2190-6815
通讯作者：
Jermsittiparsert, Kittisak
作者机构：
[Dai, Zuocai] Hunan City Univ, Coll Mech & Elect Engn, Yiyang 413002, Hunan, Peoples R China.;[Dai, Zuocai] Key Lab Energy Monitoring & Edge Comp Smart City, Yiyang 413002, Hunan, Peoples R China.;[Chen, Zhengxian] Columbia Univ, Dept Mech Engn, New York, NY 10027 USA.;[Selmi, Abdellatif] Prince Sattam Bin Abdulaziz Univ, Coll Engn, Dept Civil Engn, Al Kharj 11942, Saudi Arabia.;[Selmi, Abdellatif] Ecole Natl Ingenieurs Tunis ENIT, Civil Engn Lab, BP 37, Tunis 1002, Tunisia.
通讯机构：
[Jermsittiparsert, Kittisak] D;[Jermsittiparsert, Kittisak] H;Duy Tan Univ, Inst Res & Dev, Da Nang 550000, Vietnam.;Duy Tan Univ, Fac Humanities & Social Sci, Da Nang 550000, Vietnam.;Henan Univ Econ & Law, MBA Sch, Zhengzhou 450046, Henan, Peoples R China.
期刊：
Journal of Materials Engineering and Performance,2023年32(16):7363-7371 ISSN：1059-9495
通讯作者：
Bin Jiang<&wdkj&>Yuan Yuan
作者机构：
[Zhao, Jun; He, Xia; Liu, Yang; Xiao, Baijun; Chen, Ganxin] Hunan City Univ, Sch Mech & Elect Engn, Yiyang 413002, Peoples R China.;[Jiang, Bin; Yuan, Yuan; Yuan, Ming; Pan, Fusheng] Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China.;[Xu, Jun] Guangdong Acad Sci, Inst New Mat, Guangzhou 510650, Peoples R China.;[Yuan, Ming] Hubei Engn Univ, Sch Chem & Mat Sci, Xiaogan 432000, Peoples R China.
通讯机构：
[Bin Jiang; Yuan Yuan] N;National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, China<&wdkj&>National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, China
关键词：
Mg-Gd alloy;mechanical properties;texture;Zn and Ca co-additions
摘要：
The effects of combined addition of Zn and Ca to Mg-1Gd alloy (Mg-1Gd-1.5Zn-1Ca wt.%) on its microstructure and mechanical properties were studied. The results showed that the fine and coarse Mg2Ca and Ca2Mg6Zn3 phase particles were formed in the matrix by the combined additions of Zn and Ca. A drastic refinement of dynamic recrystallized grains was observed in the extruded Mg-1Gd-1.5Zn-1Ca alloy sheet. A remarkable yield strength enhancement and minor ductility decrement have been observed, where strength remarkably increases from 73 to 153 MPa along ED and from 119 to 182 MPa along TD and the ductility decreases from 25.1 to 18.8% along ED and from 13.6 to 9.8% along TD. The SEM and TEM analysis showed that the formed high-density fine Mg2Ca and Ca2Mg6Zn3 particles and the co-segregations of Ca and Zn in grain boundaries led to the fine structure and the strength enhancement.
摘要：
The role of Zn addition (1, 2 wt%) on the microstructural characteristics and tensile properties of the extruded Mg-1Mn-1Nd (MN11) alloy is discussed. The addition of Zn negligibly influences the particle type; however, Zn addition causes un-homogeneous distribution structure firstly and then develops homogeneous structure because of the change of size and distribution of Mg12Nd particles. The MZN111 sheet shows higher yield strength (YS) along the extrusion direction (ED), and lower YS along the transverse direction (TD), compared to the MN11 sheet. This improvement is attributed to the Zn solute atoms via solid-solution strengthening effect, while the reduction is ascribed to the formation of TD-orientation texture and coalescence of dynamic recrystallized (DRXed) grains. As the Zn content increases to 2 wt%, The MZN121 sheet with highest strength can be ascribed to the homogeneous distribution of finest grains via the grain-boundary strengthening effect and more Zn solute atoms via solid-solution strengthening effect. The increased size of Mg12Nd particles with 1 wt% Zn content and coalescence of DRXed grains, which can significantly reduce the ductility of MZN111 sheet. Further, the ductility enhancement of the MZN121 sheet is mainly due to the homogeneous distribution of fine grains and homogeneous alignment of Mg12Nd particles.
期刊：
Biomass Conversion and Biorefinery,2023年13(16):15309-15309 ISSN：2190-6815
通讯作者：
Jermsittiparsert, K
作者机构：
[Dai, Zuocai] Hunan City Univ, Coll Mech & Elect Engn, Yiyang 413002, Hunan, Peoples R China.;[Dai, Zuocai] Key Lab Energy Monitoring & Edge Comp Smart City, Yiyang 413002, Hunan, Peoples R China.;[Chen, Zhengxian] Columbia Univ, Dept Mech Engn, New York, NY 10027 USA.;[Selmi, Abdellatif] Prince Sattam Bin Abdulaziz Univ, Dept Civil Engn, Coll Engn, Al Kharj 11942, Saudi Arabia.;[Selmi, Abdellatif] Ecole Natl Ingn deTunis ENIT, Civil Engn Lab, BP 37,Blvd 1002, Tunis, Tunisia.
通讯机构：
[Jermsittiparsert, K ] D;Duy Tan Univ, Inst Res & Dev, Da Nang 550000, Vietnam.;Duy Tan Univ, Fac Humanities & Social Sci, Da Nang 550000, Vietnam.;Henan Univ Econ & Law, MBA Sch, Zhengzhou 450046, Henan, Peoples R China.
期刊：
Biomass Conversion and Biorefinery,2023年13(16):15309-15309 ISSN：2190-6815
通讯作者：
Jermsittiparsert, K
作者机构：
[Dai, Zuocai] Hunan City Univ, Coll Mech & Elect Engn, Yiyang 413002, Hunan, Peoples R China.;[Dai, Zuocai] Key Lab Energy Monitoring & Edge Comp Smart City, Yiyang 413002, Hunan, Peoples R China.;[Chen, Zhengxian] Columbia Univ, Dept Mech Engn, New York, NY 10027 USA.;[Selmi, Abdellatif] Prince Sattam Bin Abdulaziz Univ, Dept Civil Engn, Coll Engn, Al Kharj 11942, Saudi Arabia.;[Selmi, Abdellatif] Ecole Natl Ingn Tunis ENIT, Civil Engn Lab, BP 37, Tunis 1002, Tunisia.
通讯机构：
[Jermsittiparsert, K ] D;Duy Tan Univ, Inst Res & Dev, Da Nang 550000, Vietnam.;Duy Tan Univ, Fac Humanities & Social Sci, Da Nang 550000, Vietnam.;Henan Univ Econ & Law, MBA Sch, Zhengzhou 450046, Henan, Peoples R China.
作者机构：
[Xu, Jun; Zheng, Kaihong; Pan, Fusheng] Guangdong Acad Sci, Inst New Mat, Guangzhou 510650, Peoples R China.;[Xu, Jun; Zhang, Weiwen] South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510641, Peoples R China.;[Jiang, Bin; Pan, Fusheng] Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China.;[Zhao, Jun] Hunan City Univ, Sch Mech & Elect Engn, Yiyang 413002, Peoples R China.;[Xu, Jun] Chang Xing St 363, Guangzhou, Peoples R China.
通讯机构：
[Xu, J ] C;[Jiang, B ] S;Sha Zheng St 174, Chongqing, Peoples R China.;Chang Xing St 363, Guangzhou, Peoples R China.
摘要：
The Mg-3Li alloy has been extruded at different temperatures (extrusion temperatures of 240 degrees C, 270 degrees C, 300 degrees C, 330 degrees C, 370 degrees C) and the microstructure, texture and tensile properties of the extruded sheet are investigated. Results show that the average grain size increases, the basal texture weakens with the increase of extrusion temperature and the development of a transverse direction (TD)-split texture. The highest grain size, the weakest basal texture and the strongest TD-split texture are developed in the alloy extruded at 370 degrees C. This may be associated with enhancement of prismatic slip activity. The alloy extruded at 240 degrees C exhibits the highest yield strength because of the fine grain structure and strong basal texture. The alloy extruded at 370 degrees C in tension along the TD has the highest ductility, which is associated with the weakened basal texture and the formation of a TD-split texture.
作者机构：
[Zhao, Jun] Hunan City Univ, Sch Mech & Elect Engn, Yiyang 413002, Peoples R China.;[Jiang, Bin; Yuan, Ming; Huang, Guangsheng; Pan, Fusheng] Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmission, Chongqing 400044, Peoples R China.;[Wang, Qinghang] Yangzhou Univ, Sch Mech Engn, Yangzhou 225127, Jiangsu, Peoples R China.;[Chai, Yanfu] Shaoxing Univ, Sch Mech & Elect Engn, Shaoxing 312000, Peoples R China.
通讯机构：
[Bin Jiang] S;State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University, Chongqing, China
摘要：
Li addition is verified to be an effective method to increase the room temperature ductility and formability of Mg alloys. In the present study, the microstructure, texture, and tensile properties of the extruded Mg-1Zn-xLi (wt%, x = 0, 1, 3, 5) alloy sheets were studied by X-ray diffraction (XRD), scanning electron microscope (SEM), and electron backscatter diffraction (EBSD). It was found that Li addition resulted in the grain coarsening and the development of new transverse direction (TD)-tilting and 〈
$$10\bar{1}0$$
〉 parallel to extrusion direction textures, which was related to the improved dynamic recrystallization and the increased prismatic slip during extrusion. The Mg-1Zn−5Li sheet showed the weakest texture, which contained both basal and TD-tilting oriented grains. No additional phase was formed with Li addition. The yield strength of Mg-1Zn-xLi sheets gradually decreased with increasing Li content, which was mainly related to the grain coarsening and texture weakening. In addition, the ductility of the Mg-1Zn-xLi sheet was remarkably enhanced by Li addition. The elongation of the Mg-1Zn-5Li sheet was 30.3% along the TD, which was three times than that of Mg-1Zn sheet. Microstructural analysis implied that this significant ductility enhancement was associated with the improvement activation of prismatic and basal slips during the tensile tests. This study may provide insights into the development of high-ductility, low-density Mg-Zn-Li based alloys.
期刊：
Advances in Materials Science and Engineering,2022年2022 ISSN：1687-8434
通讯作者：
Dai, Zuocai(daizuocai@hncu.edu.cn)
作者机构：
[Huang, Zhiliang; Li, Hao; Dai, Zuocai] Hunan City Univ, Coll Mech & Elect Engn, Yiyang 413002, Hunan, Peoples R China.;[Huang, Zhiliang; Dai, Zuocai] Key Lab Energy Monitoring & Edge Comp Smart City H, Yiyang 413002, Hunan, Peoples R China.;[Zhou, Sha] Hunan City Univ, Yiyang 413002, Hunan, Peoples R China.
通讯机构：
[Hao Li; Zuocai Dai; Zhiliang Huang] C;[Sha Zhou] H;College of Mechanical and Electrical Engineering,Hunan City University,Yiyang 413002,China<&wdkj&>College of Mechanical and Electrical Engineering,Hunan City University,Yiyang 413002,China<&wdkj&>Key Laboratory Energy Monitoring and Edge Computing for Smart City of Hunan Province,Yiyang 413002,Hunan,China<&wdkj&>Hunan City University,Yiyang 413002,Hunan,China
关键词：
Introduction;Materials and Methods;Results;Discussion;Conclusion;Abstract;Data Availability;Additional Points;Ethical Approval;Consent;Disclosure;Conflicts of Interests;Authors’ Contributions;Funding Statement;Acknowledgements;Acknowledgments;Supplementary Materials;Reference;Dataset Description;Dataset Files;Abstract;Introduction;Introduction and Materials;Introduction and Methods;Materials;Materials and Methods;Methods;Results;Discussion;Results and Discussion;Discussion and Conclusion;Results and Conclusion;Conclusion;Conclusions;Data Availability;Additional Points;Ethical Approval;Consent;Disclosure;Conflicts of Interest;Authors’ Contributions;Funding Statement;Acknowledgements;Supplementary Materials;References;Appendix;Abbreviations;Preliminaries;Introduction and Preliminaries;Notation;Proof of Theorem;Proofs;Analysis of Results;Examples;Numerical Example;Applications;Numerical Simulation;Model;Model Formulation;Systematic Palaeontology;Nomenclatural Acts;Taxonomic Implications;Experimental;Synthesis;Overview;Characterization;Background;Experimental;Theories;Calculations;Model Verification;Model Implementation;Geographic location;Study Area;Geological setting;Data Collection;Field Testing;Data and Sampling;Dataset;Literature Review;Related Works;Related Work;System Model;Methods and Data;Experimental Results;Results and Analysis;Evaluation;Implementation;Case Presentation;Case Report;Search Terms;Case Description;Case Series;Background;Limitations;Additional Points;Case;Case 1;Case 2 etc.;Concern Details;Retraction Details;Copyright;Related Articles
期刊：
Advances in Materials Science and Engineering,2022年2022 ISSN：1687-8434
通讯作者：
Dai, Zuocai(daizuocai@hncu.edu.cn)
作者机构：
[Wang, Yanpeng; Yang, Tongguang; Dai, Zuocai] Hunan City Univ, Coll Mech & Elect Engn, Yiyang 413002, Hunan, Peoples R China.;[Yang, Tongguang; Dai, Zuocai] Key Lab Energy Monitoring & Edge Comp Smart City H, Yiyang 413002, Hunan, Peoples R China.;[Zhou, Sha] Hunan City Univ, Yiyang 413002, Hunan, Peoples R China.
通讯机构：
[Zuocai Dai; Yanpeng Wang; Tongguang Yang] C;[Sha Zhou] H;College of Mechanical and Electrical Engineering,Hunan City University,Yiyang 413002,China<&wdkj&>College of Mechanical and Electrical Engineering,Hunan City University,Yiyang 413002,China<&wdkj&>Key Laboratory Energy Monitoring and Edge Computing for Smart City of Hunan Province,Yiyang 413002,Hunan,China<&wdkj&>Hunan City University,Yiyang 413002,Hunan,China
关键词：
Introduction;Materials and Methods;Results;Discussion;Conclusion;Abstract;Data Availability;Additional Points;Ethical Approval;Consent;Disclosure;Conflicts of Interests;Authors’ Contributions;Funding Statement;Acknowledgements;Acknowledgments;Supplementary Materials;Reference;Dataset Description;Dataset Files;Abstract;Introduction;Introduction and Materials;Introduction and Methods;Materials;Materials and Methods;Methods;Results;Discussion;Results and Discussion;Discussion and Conclusion;Results and Conclusion;Conclusion;Conclusions;Data Availability;Additional Points;Ethical Approval;Consent;Disclosure;Conflicts of Interest;Authors’ Contributions;Funding Statement;Acknowledgements;Supplementary Materials;References;Appendix;Abbreviations;Preliminaries;Introduction and Preliminaries;Notation;Proof of Theorem;Proofs;Analysis of Results;Examples;Numerical Example;Applications;Numerical Simulation;Model;Model Formulation;Systematic Palaeontology;Nomenclatural Acts;Taxonomic Implications;Experimental;Synthesis;Overview;Characterization;Background;Experimental;Theories;Calculations;Model Verification;Model Implementation;Geographic location;Study Area;Geological setting;Data Collection;Field Testing;Data and Sampling;Dataset;Literature Review;Related Works;Related Work;System Model;Methods and Data;Experimental Results;Results and Analysis;Evaluation;Implementation;Case Presentation;Case Report;Search Terms;Case Description;Case Series;Background;Limitations;Additional Points;Case;Case 1;Case 2 etc.;Concern Details;Retraction Details;Copyright;Related Articles
摘要：
The influence of Mn content on the microstructure, tensile properties and strain-hardening behaviors of extruded Mg-1Gd-0.5Zn-xMn (x=0, 0.3 and 1, wt.%) alloy sheets was investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), and electron backscatter diffraction (EBSD). The results show that the completely recrystallized grain structure and the extrusion direction (ED)-titling texture are observed in all the extruded sheets. The mean grain size and weakened ED-titling texture of the extruded sheets are gradually reduced with increasing Mn content. This is primarily associated with the formation of new fine a-Mn particles by Mn addition. Tensile properties show that the addition of Mn also leads to the improvement of yield strengths, ultimate tensile strengths and elongations of the extruded Mg-1Gd-0.5Zn-xMn sheets, which is mainly due to the fine grains and alpha-Mn particles. In addition, the Mg-1Gd-0.5Zn-1Mn sheet has the lowest strain-hardening exponent and the best hardening capacity among all prepared Mg-1Gd-0.5Zn-xMn sheets.
摘要：
Microstructure, texture and mechanical properties of extruded Mg-xGd sheets (x = 1.0, 1.5, 2.0 and 2.5 wt%) were discussed, and microstructural evolution of an Mg-1.0Gd alloy during extrusion were investigated. The extruded Mg-xGd sheets presented a fully recrystallized microstructure. The texture with [112 over line 1]-[202 over line 1] double fibre orientations was observed in all the extruded sheets, and texture weakening was observed with increasing Gd content. With an increase in Gd content, the tensile strength of the sheets gradually increased mainly due to the fine grain size and more Gd atoms, and an increase in ductility was related to the fine grain size, more Gd atoms and higher Schmid factor for basal slip. During extrusion, the development of compression twins and {101 over line 1}-{101 over line 2} double twins played a key role in the formation of [112 over line 1]-[2021] double fibre texture. Fine recrystallized grains having an unusual texture with [112 over line 1]-[202 over line 1] double fibre orientation preferentially formed in the undynamically recrystallized matrix with [101 over line 0] fibre orientation via continuous dynamically recrystallization and have grown along well-defined bands. Further extrusion deformation resulted in a fully recrystallized microstructure with an unusual texture.
