Evaluation of thermal aging of δ-ferrite in austenitic stainless steel weld using nanopillar compression test

被引：34

作者：

Lee, Ho Jung ^{[1
]}

Kong, Byeong Seo ^{[2
]}

Subramanian, Gokul Obulan ^{[2
]}

Heo, Jaewon ^{[2
]}

Jang, Changheui ^{[2
]}

Lee, Kyoung-Soo ^{[1
]}

机构：

[1] Korea Hydro & Nucl Power Co Ltd, Cent Res Inst, Daejeon 34101, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Daejeon 34141, South Korea

来源：

SCRIPTA MATERIALIA | 2018年 / 155卷

关键词：

Thermal aging; delta-Ferrites; Spinodal decomposition; G phase; Nanopillar compression test; TRANSMISSION ELECTRON-MICROSCOPY; G-PHASE PRECIPITATION; MECHANICAL PROPERTY; LOW-TEMPERATURE; MICROSTRUCTURE EVOLUTION; SPINODAL DECOMPOSITION; FE-CR; EMBRITTLEMENT; BEHAVIOR; RECOVERY;

D O I：

10.1016/j.scriptamat.2018.06.016

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of thermal aging on microstructure and mechanical property change of delta-ferrite in an austenitic stainless steel weld were investigated. After thermal aging at 400 degrees C for 20,000 h, spinodal decomposition and G phase precipitation were observed, along with similar to 80% increase in yield strength measured by nanopillar compression test. Subsequent reversion heat treatment removed spinodal decomposition while leaving G phase, resulting in partial recovery of hardening in delta-ferrite. It was estimated that similar to 60% of the hardening in the delta-ferrite of the aged specimen was attributed to spinodal decomposition and similar to 40% to G phase, respectively. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：32 / 36

页数：5

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