文献类型：期刊文献

英文题名：Achieving high strength near 400 MPa in an ultra-fine grained Mg-Bi-Ca ternary alloy via low-temperature extrusion

作者：Zhai, Haowei[1];Wang, Li[1];Wang, Qinghang[1,2,3];Li, Meng[3];Chai, Yanfu[4];Xu, Jun[5];Jiang, Bin[6,7]

机构：[1]Yangzhou Univ, Sch Mech Engn, Yangzhou 225127, Peoples R China;[2]Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China;[3]CIT Dicastal Co Ltd, Qinhuangdao 066000, Peoples R China;[4]Shaoxing Univ, Sch Mech & Elect Engn, Shaoxing 312000, Peoples R China;[5]Guangdong Acad Sci, Inst New Mat, Guangzhou 510650, Peoples R China;[6]Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China;[7]Chongqing Inst Adv Light Met, Chongqing 400030, Peoples R China

年份：2023

卷号：26

起止页码：3973

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

收录：SCI-EXPANDED(收录号：WOS:001068277400001)、、EI(收录号：20233514660717)、Scopus(收录号：2-s2.0-85169024233)、WOS

基金：This research was funded by the National Natural Science Foundation of China (No. 52204407), the Natural Science Foundation of Jiangsu Province (No. BK20220595), the China Postdoctoral Science Foundation (Nos. 2022M723689 and 2022M720858) and the Science and technology research projects in Keqiao District (No. 2022JBGS303).

语种：英文

外文关键词：Mg-Bi-Ca alloy; Low-temperature extrusion; Dynamic recrystallization; Dislocation behavior; Mechanical property

外文摘要：Significantly enhancing the mechanical properties of Mg-Bi base series alloys is of great significance for their wider application prospects. Here, a new Mg-3Bi-1Ca (BX31, wt.%) alloy showing high tensile yield strength of-397.1 MPa, high ultimate tensile strength of-416.2 MPa and acceptable elongation of-8% was fabricated by low-temperature extrusion. The analysis of microstructure showed that the enhanced yield strength was attributed to the ultra-fine grain structure (-0.84 mm), nano-scale second phases including Mg2Bi2Ca and Mg2Ca, and Ca segregation at grain boundaries. In addition, a weak basal fiber texture to some extent provided more basal slip activities, guaranteeing the suitable ductility. The dynamic recrystallization and dislocation behavior of the BX31 billet during extrusion were also systematically observed and discussed to reveal the formation mechanisms of the ultra-fine grain structure with the weak basal fiber texture in the as-extruded BX31 alloy. As mentioned above, this work offers a new insight to obtain high-performance Mg-Bi base series alloys.& COPY; 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).