Deformation behavior of austenitic stainless steel at deep cryogenic temperatures

被引：44

作者：

Han, Wentuo ^{[1
]}

Liu, Yuchen ^{[1
]}

Wan, Farong ^{[1
]}

Liu, Pingping ^{[1
]}

Yi, Xiaoou ^{[1
]}

Zhan, Qian ^{[1
]}

Morrall, Daniel ^{[2
]}

Ohnuki, Somei ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[2] Kyoto Univ, Grad Sch Energy Sci, Uji, Kyoto 6110011, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2018年 / 504卷

基金：

北京市自然科学基金;

关键词：

Austenitic steel; Stress-induced evolution; Cryogenic temperature; Serrated yielding; Martensitic transformation; COPPER SINGLE-CRYSTALS; ELECTRON-MICROSCOPY; PLASTIC-DEFORMATION; LARGE STRAINS; TRANSFORMATION; MECHANISM; ALLOY; 4.2K; 316L;

D O I：

10.1016/j.jnucmat.2018.03.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The nonmagnetic austenite steels are the jacket materials for low-temperature superconductors of fusion reactors. The present work provides evidences that austenites transform to magnetic martensite when deformation with a high-strain is imposed at 77 K and 4.2 K. The 4.2 K test is characterized by serrated yielding that is related to the specific motion of dislocations and phase transformations. The in-situ transmission electron microscope (TEM) observations in nanoscale reveal that austenites achieve deformation by twinning under low-strain conditions at deep cryogenic temperatures. The generations of twins, martensitic transformations, and serrated yielding are in order of increasing difficulty. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：29 / 32

页数：4

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