Effect of thermal cycles on the corrosion and mechanical properties of UNS S31803 duplex stainless steel

被引：135
作者：
Deng, Bo [1 ]
Wang, Zhiyu [2 ]
Jiang, Yiming [1 ]
Sun, Tao [1 ]
Xu, Juliang [1 ]
Li, Jin [1 ]
机构：
[1] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China
[2] Baosteel Co Ltd, Inst Stainless Steel, Shanghai 201900, Peoples R China
来源：
CORROSION SCIENCE | 2009年 / 51卷 / 12期
基金：
美国国家科学基金会;
关键词：
Stainless steel; SEM; Pitting corrosion; Welding; CRITICAL PITTING TEMPERATURE; SIGMA-PHASE PRECIPITATION; MICROSTRUCTURAL STABILITY; LOCALIZED CORROSION; RESISTANCE; EVOLUTION; TOUGHNESS; BEHAVIOR; 850-DEGREES-C; MORPHOLOGY;
D O I：
10.1016/j.corsci.2009.08.015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and properties of UNS S31803 duplex stainless steel had been investigated following isothermally aging in a temperature range of 450-1000 degrees C for 10 min, which simulates a fairly long time relative to a weld thermal cycle. The results showed that specimens aged between 600 and 950 degrees C are subjected to precipitation of secondary phases, such as Cr2N, sigma and chi. And the most significant reduction in pitting corrosion resistance and impact energy occurs at 850 degrees C. Moreover, at aging temperatures below 600 degrees C, austenite is the preferred site for pitting initiation, which changes to precipitates modified ferrite phase at higher temperatures above 600 degrees C. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：2969 / 2975
页数：7
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