Fracture toughness and fracture behavior of SA508-III steel at different temperatures

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	Fracture toughness and fracture behavior of SA508-III steel at different temperatures
其他题名	Fracture toughness and fracture behavior of SA508-III steel at different temperatures
	Liu Jiahua; Wang Lei; Liu Yang; Song Xiu; Luo Jiong; Yuan Dan
	2014
发表期刊	INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
ISSN	1674-4799
卷号	21 期号:12 页码:1187-1195
摘要	The fracture toughness of SA508-III steel was studied in the temperature range from room temperature to 320A degrees C using the J-integral method. The fracture behavior of the steel was also investigated. It was found that the conditional fracture toughness (J (Q)) of the steel first decreased and then increased with increasing test temperature. The maximum and minimum values of J (Q) were 517.4 kJ/m(2) at 25A degrees C and 304.5 kJ/m(2) at 180A degrees C, respectively. Dynamic strain aging (DSA) was also observed to occur when the temperature exceeded 260A degrees C with a certain strain rate. Both the dislocation density and the number of small dislocation cells effectively increased because of the occurrence of DSA; as a consequence, crack propagation was more strongly inhibited in the steel. Simultaneously, an increasing number of fine carbides precipitated under high stress at temperatures greater than 260A degrees C. Thus, the deformation resistance of the steel was improved and the J (Q) was enhanced.
其他摘要	The fracture toughness of SA508-III steel was studied in the temperature range from room temperature to 320°C using the J-integral method. The fracture behavior of the steel was also investigated. It was found that the conditional fracture toughness (J_Q) of the steel first decreased and then increased with increasing test temperature. The maximum and minimum values of J_Q were 517.4 kJ/m~2 at 25°C and 304.5 kJ/m~2 at 180°C, respectively. Dynamic strain aging (DSA) was also observed to occur when the temperature exceeded 260°C with a certain strain rate. Both the dislocation density and the number of small dislocation cells effectively increased because of the occurrence of DSA; as a consequence, crack propagation was more strongly inhibited in the steel. Simultaneously, an increasing number of fine carbides precipitated under high stress at temperatures greater than 260°C. Thus, the deformation resistance of the steel was improved and the J_Q was enhanced.
关键词	PRESSURE-VESSEL STEELS CYCLE FATIGUE BEHAVIOR CU-RICH CLUSTERS MECHANICAL-PROPERTIES CARBIDE DISTRIBUTION STAINLESS-STEEL SA-508 STEEL CRACK-GROWTH PRECIPITATION ENVIRONMENTS low alloyed steel fracture toughness fracture behavior temperature dynamic strain aging nuclear power plants
收录类别	CSCD
语种	英语
资助项目	[Major State Basic Research Development Program of China] ; [National Natural Science Foundation of China] ; [Fundamental Research Fund for the Central Universities of China]
CSCD记录号	CSCD:5325197
引用统计	被引频次：3[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/158190
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 GB/T 7714	Liu Jiahua,Wang Lei,Liu Yang,et al. Fracture toughness and fracture behavior of SA508-III steel at different temperatures[J]. INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,2014,21(12):1187-1195.
APA	Liu Jiahua,Wang Lei,Liu Yang,Song Xiu,Luo Jiong,&Yuan Dan.(2014).Fracture toughness and fracture behavior of SA508-III steel at different temperatures.INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,21(12),1187-1195.
MLA	Liu Jiahua,et al."Fracture toughness and fracture behavior of SA508-III steel at different temperatures".INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS 21.12(2014):1187-1195.