Effect of ultrasonic impact peening on the corrosion of ferritic-martensitic steels in supercritical water

被引：29

作者：

Dong, Ziqiang ^{[1
]}

Liu, Zhe ^{[1
]}

Li, Ming ^{[1
]}

Luo, Jing-Li ^{[1
]}

Chen, Weixing ^{[1
]}

Zheng, Wenyue ^{[2
]}

Guzonas, Dave ^{[3
]}

机构：

[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB, Canada

[2] MTL NRCan, Hamilton, ON, Canada

[3] Atom Energy Canada Ltd, Chalk River Labs, Chalk River, ON K0J 1J0, Canada

来源：

JOURNAL OF NUCLEAR MATERIALS | 2015年 / 457卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

STAINLESS-STEELS; OXIDATION; CR;

D O I：

10.1016/j.jnucmat.2014.11.028

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ferritic-Martensitic (F/M) steels are important candidate alloys to be used in the next generation (Generation-IV) SCWRs. In this work, two F/M steels with the same Cr content of around 12 wt.% and varied Si content from 0.6 wt.% to 2.2 wt.% were evaluated in supercritical water (SCW) at 500 degrees C and 25 MPa for up to 1000 h. The effect of ultrasonic shot peening on the oxidation behavior of these F/M steels have been investigated. The results showed that the oxidation was affected by the Si content as well as the surface modification. The F/M steel with low Si concentration exhibited higher corrosion resistance than that of the alloy with high Si content. Shot peening, which could modify the microstructure at the surface, showed significantly beneficial effect to improving the oxidation resistance. A thin, uniform oxide layer formed on the peened sample could be attributed to the enhanced diffusion of Cr induced by the surface modification. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：266 / 272

页数：7

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