Effect of Short-Time Aging on the Pitting Corrosion Behavior of a Novel Lean Duplex Stainless Steel 2002

被引：6

作者：

Sun, Tian-Yi ^{[1
]}

Guo, Yan-Jun ^{[1
]}

Jiang, Yi-Ming ^{[1
]}

Li, Jin ^{[1
]}

机构：

[1] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China

来源：

ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2019年 / 32卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Lean duplex stainless steel; Aging; Pitting corrosion; Impact energy; Precipitates; HEAT-AFFECTED ZONE; PRECIPITATION; RESISTANCE; TEMPERATURE; MICROSTRUCTURE; EMBRITTLEMENT; EVOLUTION; NITROGEN;

D O I：

10.1007/s40195-018-0829-y

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effect of short-time aging in the temperature range between 400 and 1000 degrees C on the pitting corrosion behavior and mechanical property of a novel lean duplex stainless steel (LDSS) 2002 was investigated through the potentiostatic critical pitting temperature (CPT) tests and the Charpy impact tests. Both the pitting corrosion resistance and the toughness of aged specimens degraded due to the precipitation of detrimental secondary phases and the most significant reduction of CPT and impact energy emerged at 650 degrees C concurrently. The CPT of LDSS 2002 specimen aged at 650 degrees C decreased by 28 degrees C, and the impact energy dropped from 69 to 29J/cm(2) compared with the solution-annealed sample. Transmission electron microscopy characterization showed that the main precipitates in LDSS 2002 were Cr2N and M23C6 along the ferrite-austenite grain boundaries.

引用

页码：755 / 763

页数：9

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