Effects of inclusions on the precipitation of chi phases and intergranular corrosion resistance of hyper duplex stainless steel

被引：38
作者：
Jeon, Soon-Hyeok [1 ]
Kim, Hye-Jin [1 ]
Park, Yong-Soo [1 ]
机构：
[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
来源：
CORROSION SCIENCE | 2014年 / 87卷
关键词：
Stainless steel; EPMA; Inclusion; Intergranular corrosion; SIGMA-PHASE; MECHANICAL-PROPERTIES; PITTING CORROSION; MICROSTRUCTURAL STABILITY; CHLORIDE SOLUTION; WELD METAL; PITS; TEMPERATURE; NITROGEN; BEHAVIOR;
D O I：
10.1016/j.corsci.2014.06.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
During the initial stage of aging heat treatment at 850 degrees C, inclusions such as (Cr, Mn, Al) oxides and (Cr, Mn, Al, Fe) oxides of a hyper duplex stainless steel act as preferential precipitation sites for the chi phase like ferrite/austenite phase boundaries and ferrite/ferrite grain boundaries. The chi phase is precipitated around the inclusions due to the blocking and piling up the alloying elements such as Mo and W around the inclusions. The precipitation of Mo and W enriched chi phase around the inclusions decreases the intergranular corrosion resistance due to the formation of Mo and W depleted zones. (C) 2014 Elsevier Ltd. All rights reserved.
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页码：1 / 5
页数：5
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