文献类型：期刊文献

英文题名：Comparison of room-temperature stretch formability of the as extruded Mg-Gd alloys with different double-peak pole spacing

作者：He, Chao[1];Zhu, Huarong[5];Yuan, Ming[1,3];Jiang, Bin[1,2];Wang, Qinghang[4];Chai, Yanfu[6];Huang, Guangsheng[1];Zhang, Dingfei[1];Pan, Fusheng[1,2]

机构：[1]Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China;[2]Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China;[3]Hubei Engn Univ, Sch Chem & Mat Sci, Xiaogan 432000, Peoples R China;[4]Yangzhou Univ, Sch Mech Engn, Yangzhou 225127, Jiangsu, Peoples R China;[5]Chongqing Chang Automobile Co Ltd, Chongqing 400023, Peoples R China;[6]Shaoxing Univ, Sch Mech & Elect Engn, Shaoxing 312000, Peoples R China

年份：2021

卷号：15

起止页码：4838

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：SCI-EXPANDED(收录号：WOS:000719246700002)、、EI(收录号：20214511131462)、Scopus(收录号：2-s2.0-85118528271)、WOS

基金：The authors are grateful for the financial supports from the National Natural Science Foundation of China (U1764253,51971044, U1910213 52001037, and U207601) , the National Defense Basic Scientific Research Program of China, the Chongqing Science and Technology Commission (cstc2017zdcy-zdzxX0006) , the Chongqing Scientific & Tech-nological Talents Program (KJXX2017002) and Qinghai Scien-tific & Technological Program (2018-GX-A1) and Natural Science Foundation of Chongqing (Project No. cstc2019jcyj-msxmX0234) .

语种：英文

外文关键词：Mg-2Gd alloy; Texture; Microstructure; Twinning; Formability

外文摘要：This paper focused on the effect of angle a that the basal poles tilted from normal direction (ND) toward the extruded direction (ED) on the formability of as-extruded Mg-2Gd (wt.%) alloy sheets. The studied Mg-2Gd (wt%) alloy sheets with the angle alpha of 23 degrees, 32 degrees and 45 degrees, respectively, were designed. The Erichsen test was carried out at the ambient temperature, in which the microstructure and texture evolution was characterized by the electron backscatter diffraction (EBSD) technique. The results showed that the strain coordination ability of the Mg-2Gd sheet along the thickness direction was enhanced with the increase of angle alpha, giving rise to a higher Index Erichsen (IE) value of 7.5 mm for the alpha of 45 degrees due to a lower gamma-value. This superior high formability is not only closely associated with the lower gamma-value but also with the higher Schmid factors for basal slip (SFbasal) in the large-angle alpha alloy sheets. Furthermore, the twinning induced a more random distribution along the transverse direction (TD) of basal texture in the early stage of the Erichsen test, which cancels out the SF b asa l reduction effect caused by the activation of basal slip. The TDextended twinning texture provided a softer orientation for the TD strain during the Erichsen test, such that excellent formability was achieved in the alloy sheets with a larger angle alpha. (C) 2021 The Authors. Published by Elsevier B.V.