Fatigue Cracking Characteristics of Diffusion Pipes for Z6CNT18-10 Austenitic Stainless Steel in Steam Hydrophobic Environment

LI Xingang; GUO Kai; ZHAI Xinnian; HUANG Jincai

doi:10.11973/lhjy-wl201905002

PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING > 2019 > 55(5): 294-297. > DOI: 10.11973/lhjy-wl201905002

LI Xingang, GUO Kai, ZHAI Xinnian, HUANG Jincai. Fatigue Cracking Characteristics of Diffusion Pipes for Z6CNT18-10 Austenitic Stainless Steel in Steam Hydrophobic Environment[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2019, 55(5): 294-297. DOI: 10.11973/lhjy-wl201905002

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Fatigue Cracking Characteristics of Diffusion Pipes for Z6CNT18-10 Austenitic Stainless Steel in Steam Hydrophobic Environment

1. Daya Bay Nuclear Power Operations and Management Co., Ltd., Shenzhen 518000, China;
2. CNNC Shenzhen Kaili Group Co., Ltd., Shenzhen 518000, China

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Received Date: January 30, 2019

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Abstract

The fatigue fracture characteristics of diffusion pipes for Z6CNT18-10 austenitic stainless steel in steam hydrophobic environment were studied by means of metallographic microscope, scanning electron microscope and X-ray diffraction. The results show that the fatigue cracks of diffuser pipes for austenitic stainless steel in steam hydrophobic environment originated from the inner wall, and they were unlike common fatigue cracks which often originated from the outer wall. There was obvious oxidation phenomenon at the crack source. There were some stationary slip bands in the microstructures near the cracks.The fatigue bands had very narrow spacing. There was almost no the final fracture zone in the microstructures, which belongs to high cycle fatigue.
- austenitic stainless steel,
- diffusion pipe,
- fatigue cracking,
- slip band

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[1]	KIM Y J,JANG H,OH Y J. High temperature low cycle fatigue properties of a HF30-type cast austenitic stainless steel[J]. Materials Science and Engineering:A,2009,526(1/2):244-249.
[2]	XU S,WU X Q,HAN E H,et al. Crack initiation mechanisms for low cycle fatigue of type 316Ti stainless steel in high temperature water[J]. Materials Science and Engineering:A,2008,490(1/2):16-25.
[3]	徐松,吴欣强,韩恩厚,等. 316Ti不锈钢在模拟核电高温高压水中的腐蚀疲劳裂纹断口研究[J]. 中国腐蚀与防护学报,2010,30(2):119-123.
[4]	巴发海,薛宇. 热交换器不锈钢管泄漏原因分析[J]. 理化检验(物理分册),2016,52(6):415-421.
[5]	何朋非,李登科,周梦保. SUS304不锈钢三通裂纹产生原因分析[J]. 理化检验(物理分册),2018,54(1):71-73.
[6]	邹章雄,金少申,刘昌禄,等. 奥氏体不锈钢压力管道的应力腐蚀开裂及预防[J]. 理化检验(物理分册),2015,51(10):721-724.
[7]	张晓晖,余成长. 电厂疏水管路失效原因分析及改进[J]. 华北电力大学学报(自然科学版),2012,39(1):99-104.
[8]	周春林,于洪. 汽轮机主蒸汽疏水管爆管失效分析[J]. 管道技术与设备,2013(6):20-21.
[9]	KAMAYA M. Assessment of thermal fatigue damage caused by local fluid temperature fluctuation (Part I:Characteristics of constraint and stress caused by thermal striation and stratification)[J]. Nuclear Engineering and Design,2014,268(1):121-138.
[10]	HAYASHI M,ENOMOTO K,SAITO T,et al. Development of thermal fatigue testing apparatus with BWR water environment and thermal fatigue strength of austenitic stainless steels[J]. Nuclear Engineering and Design,1998,184(1):113-122.
[11]	关锰,王冬颖,程从前,等. 海水泵叶轮316L不锈钢螺钉的腐蚀原因分析[J]. 理化检验(物理分册),2015,51(11):806-809.
[12]	史宝良,李岩,张腾飞,等. 液氨储存罐304不锈钢法兰连接螺栓断裂失效分析[J]. 理化检验(物理分册),2017,53(10):740-745.
[13]	ISLAM M N,ARAI Y. Ultrasonic back reflection evaluation of crack growth from PSBs in low-cycle fatigue of stainless steel under constant load amplitude[J]. Materials Science and Engineering:A,2009,520(1/2) 49-55.
[14]	BALBI M,AVALOS M,BARTALI A E,et al. Microcrack growth and fatigue behavior of a duplex stainless steel[J]. International Journal of Fatigue,2009,31(11/12):2006-2013.
[15]	ALVAREZ A I,MARINELLI M C,MALARRI J A,et al. Microstructure associated with crack initiation during low-cycle fatigue in a low nitrogen duplex stainless steel[J]. International Journal of Fatigue,2007,29(4):758-764.

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Fatigue Cracking Characteristics of Diffusion Pipes for Z6CNT18-10 Austenitic Stainless Steel in Steam Hydrophobic Environment

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