| Fracture toughness and fracture behavior of SA508-III steel at different temperatures | |
| Alternative Title | 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 | |
| Source Publication | INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
 |
| ISSN | 1674-4799 |
| Volume | 21Issue:12Pages:1187-1195 |
| Abstract | 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. |
| Other Abstract | 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. |
| Keyword | 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 |
| Indexed By | CSCD |
| Language | 英语 |
| Funding Project | [Major State Basic Research Development Program of China] ; [National Natural Science Foundation of China] ; [Fundamental Research Fund for the Central Universities of China] |
| CSCD ID | CSCD:5325197 |
| Citation statistics |
Cited Times:3[CSCD]
[CSCD Record]
|
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/158190 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 中国科学院金属研究所 |
| Recommended Citation 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. |
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