Modified Ni equivalent for evaluating hydrogen susceptibility of Cr-Ni based austenitic stainless steels

被引：25

作者：

Kang, Jee-Hyun ^{[1
]}

Noh, Han-Seop ^{[1
]}

Kim, Kwang-Min ^{[2
]}

Lee, Soo Chan ^{[2
]}

Kim, Sung-Joon ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, GIFT, Pohang 37673, South Korea

[2] POSCO, Technol Res Labs, Pohang 37859, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 696卷

关键词：

Austenite; Stainless steel; Ni equivalent; Hydrogen embrittlement; Martensitic transformation; ENVIRONMENT EMBRITTLEMENT; INDUCED MARTENSITE; ALLOYING ELEMENTS; GAS EMBRITTLEMENT; NICKEL-EQUIVALENT; DEFORMATION; NITROGEN; TYPE-316; TRANSFORMATION; ATMOSPHERE;

D O I：

10.1016/j.jallcom.2016.12.061

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In Cr-Ni austenitic stainless steels, Ni equivalent is an important indicator of austenite stability, and thereby, the resistance to hydrogen embrittlement. Although N is often added to Cr-Ni austenitic stainless steels as a strengthening element, its contribution to Ni equivalent has not been satisfactorily taken into account. Based on an up-to-date thermodynamic database, the existing Ni equivalents are reassessed, and a modified Ni equivalent is suggested to accurately consider the N effect on austenite stability. The newly suggested Ni equivalent equal to 27 is proposed to be the lower limit for the applications in hydrogen environment. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：869 / 874

页数：6

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