The effect of temperature on the SSRT behavior of austenitic stainless steels in SCW

被引：32
|
作者：
Shen, Zhao [1 ]
Zhang, Lefu [1 ]
Tang, Rui [2 ]
Zhang, Qiang [2 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai 200240, Peoples R China
[2] Nucl Power Inst China, Natl Key Lab Nucl Fuel & Mat, Chengdu 610041, Sichuan, Peoples R China
来源：
JOURNAL OF NUCLEAR MATERIALS | 2014年 / 454卷 / 1-3期
关键词：
STRESS-CORROSION CRACKING; SUPERCRITICAL WATER;
D O I：
10.1016/j.jnucmat.2014.08.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of temperature on the tensile properties and stress corrosion cracking (SCC) susceptibility of austenitic stainless steels AL-6XN, HR3C, and 316Ti in deaerated supercritical water were studied by performing slow-strain-rate tensile (SSRT) tests. The SSRT tests were carried out in deaerated supercritical water at temperatures of 550, 600, and 650 degrees C, a pressure of 25 MPa, and a strain rate of 9.26 x 10(-7) s(-1). The results show that AL-6XN exhibits the highest ultimate tensile strength and yield strength at each temperature, followed by HR3C and then 316Ti. Temperature has a large effect on the tensile properties of each material. The SCC susceptibility of AL-6XN increases with increasing temperature, whereas 316Ti exhibits the opposite trend. The fracture surfaces of all HR3C specimens and the 316Ti specimen tested at 550 degrees C are dominated by an intergranular fracture morphology, showing the high susceptibility of these specimens to SCC. Transgranular fracture was observed for specimens of AL-6XN strained at 600 and 650 degrees C. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：274 / 282
页数：9
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