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	Thermal aging effect on Z3CN20.09M Cast Duplex Stainless Steel
	Xue, Fei ; Wang, Zhao-Xi ; Shu, Guogang ; Yu, Weiwei ; Shi, Hui-Ji ; Ti, Wenxin
	2010-10-12 ; 2010-10-12
关键词	INSTRUMENTED IMPACT FRACTURE-TOUGHNESS EMBRITTLEMENT TEMPERATURE BEHAVIOR NOTCH Nuclear Science & Technology
中文摘要	Instrumented impact tests were performed on Z3CN20.09M Cast Duplex Stainless Steel (CDSS) aged at 400 degrees C for up to 3000h. The material was cut from the primary pipe of a PWR to investigate the accelerated thermal aging embrittlement effect on the dynamic fracture properties. The load-deflection curves from the instrumented impact tests described both the loading and the fracture stages, from which the dynamic ultimate loading level and the dynamic ultimate strengths were calculated as a function of increased aging time. The increase in the dynamic ultimate strengths with aging time is much higher than those for the static ultimate strengths. With the increment of the aging time, both the crack initiation energy and the crack propagation energy decrease, which are separated form the total impact energy taking the maximum loading level as the crack initiation point. it is shown that the reduction tendency of the fracture propagation energy is the predominant reason for the reduction of the impact energy. With the increment of the aging time, the unloading slopes reflecting the crack propagation speed increase and the fracture surface patterns change from ductile fracture with shallow dimples to cleavage brittle fracture caused by dislocations piling up in the ferrite matrix. Mechanical properties of inner wall with fine equi-axed grains are much better than those of the outer wall with coarse columnar structures. (C) 2009 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE SA ; LAUSANNE ; PO BOX 564, 1001 LAUSANNE, SWITZERLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79212]
专题	清华大学
推荐引用方式 GB/T 7714	Xue, Fei,Wang, Zhao-Xi,Shu, Guogang,et al. Thermal aging effect on Z3CN20.09M Cast Duplex Stainless Steel[J],2010, 2010.
APA	Xue, Fei,Wang, Zhao-Xi,Shu, Guogang,Yu, Weiwei,Shi, Hui-Ji,&Ti, Wenxin.(2010).Thermal aging effect on Z3CN20.09M Cast Duplex Stainless Steel..
MLA	Xue, Fei,et al."Thermal aging effect on Z3CN20.09M Cast Duplex Stainless Steel".(2010).

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