TY  - JOUR
AU  - Luo, Yi-hao
AU  - Cheng, Wei-li
AU  - Yu, Hui
AU  - Wang, Hong-xia
AU  - Niu, Xiao-feng
AU  - Wang, Li-fei
AU  - Li, Hang
AU  - You, Zhi-yong
AU  - Hou, Hua
PY  - 2023
TI  - Tailoring the microstructural characteristics and enhancing creep properties of as-cast Mg-5Bi-5Sn alloy through Mn addition
JO  - Journal of Magnesium and Alloys
SN  - 2213-9567
SP  - 3350
EP  - 3361
VL  - 11
IS  - 9
AB  - The creep properties, microstructural characteristics and creep mechanisms of as-cast Mg-5Bi-5Sn (BT55) alloy without and with Mn (BTM550) addition were investigated via creep at 423, 448, and 473 K as well as stresses of 30, 50 and 75 MPa. The results indicate that adding Mn can result in the formation of primary and the dynamic precipitated α-Mn phases. In addition, the morphology of the precipitated Mg3Bi2 phase and the orientation relationship between Mg2Sn precipitates and α-Mg can be effectively modified. Tailoring the microstructural characteristics is responsible for the improved creep performance of BTM550 alloy. The dominant creep mechanisms in BT55 and BTM550 alloys are dislocation cross-slip and climb, respectively. Furthermore, twinning and pyramidal 〈c + a〉 slip play an assisting part in both alloys during creep process.
UR  - https://doi.org/10.1016/j.jma.2021.12.004
DO  - 10.1016/j.jma.2021.12.004