Dynamic recovery around deformation kink boundary of Mg-Y-Zn alloy with long-period stacking ordered structure

被引：1

作者：

Yamasaki, Michiaki ^{[1
]}

Matsumoto, Tsubasa ^{[1
]}

Mayama, Tsuyoshi ^{[1
]}

Somekawa, Hidetoshi ^{[3
]}

Hagihara, Koji ^{[2
]}

Nishimoto, Soya ^{[1
]}

Kawamura, Yoshihito ^{[1
]}

机构：

[1] Kumamoto Univ, Magnesium Res Ctr, Dept Mat Sci, 2-39-1 Kurokami,Chuo Ku, Kumamoto 8608555, Japan

[2] Natl Inst Mat Sci, Res Ctr Struct Mat, 1-2-1 Sengen, Tsukuba 3050047, Japan

[3] Nagoya Inst Technol, Dept Phys Sci & Engn, Gokiso, Aichi 4668555, Japan

来源：

MATERIALS LETTERS | 2024年 / 377卷

关键词：

Magnesium alloy; Long-period stacking ordered structure; Kink deformation; Nanoindentation; Recovery; NONBASAL SLIP SYSTEMS; TWIN BOUNDARIES; DISLOCATIONS; MECHANISMS;

D O I：

10.1016/j.matlet.2024.137360

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study demonstrated the possibility of dynamic recovery by forming a kink boundary in the long-period stacking ordered phase of the Mg85Y9Zn6 (at%) alloy. The compressive deformation at 1 % strain on the double-notched directionally solidified specimen produced three regions; undeformed, deformed, and kinkdeformed regions. A nanoindenter was applied to three different regions. The deformed region sufficiently far from the kink boundary exhibited a 26 % higher nanoindentation hardness than the undeformed region owing to work-hardening, whereas the hardness decreased when approaching the kink boundary. At 1 mu m or less from the kink boundary, the magnitude of hardness recovered to the same level as the undeformed region. This observation implies a "recovery kink zone" because of the dynamic recovery associated with kink boundary formation.

引用

页数：4

共 18 条

[1]

CONRAD H, 1957, T AM I MIN MET ENG, V209, P503

[2] The structure of long period stacking/order Mg-Zn-RE phases with extended non-stoichiometry ranges [J].