Effect of Nanoscale Cu-Riched Clusters on Strength and Impact Toughness in a Tempered Cu-Bearing HSLA Steel
文献类型:期刊论文
作者 | Du, Yubin1,2; Hu, Xiaofeng1; Song, Yuanyuan1; Zhang, Yangpeng1; Rong, Lijian1 |
刊名 | ACTA METALLURGICA SINICA-ENGLISH LETTERS |
出版日期 | 2021-07-10 |
页码 | 14 |
ISSN号 | 1006-7191 |
关键词 | High-strength low-alloy (HSLA) steel Cu-riched cluster Strengthening mechanism Lath boundary Impact energy |
DOI | 10.1007/s40195-021-01277-3 |
通讯作者 | Hu, Xiaofeng(xfhu@imr.ac.cn) ; Rong, Lijian(ljrong@imr.ac.cn) |
英文摘要 | The effect of Cu-riched clusters on strength and impact toughness in a tempered Cu-bearing high-strength low-alloy (HSLA) steel is investigated. With increasing the tempering temperature, it is found that the yield strength increases firstly, achieving the maximum value (similar to 1053 MPa) at the tempering temperature of 450 degrees C, and then decreases significantly with the rise of tempering temperature. The tempering temperature-dependent yield strength is closely related to the precipitation of Cu-riched clusters. When tempering at 450 degrees C, the peak strength will be reached as the nanoscale Cu-riched clusters with small size and high number density will cause a strong precipitation strengthening (similar to 492 MPa) due to the dislocation shearing mechanism. However, the Cu-riched clusters will coarsen with further increasing tempering temperature, resulting in obvious decrement of yield strength owing to the dislocation bypassing mechanism. Compared with the yield strength, the variation in impact energy displays an inverse tendency and the impact energy is only 7 J for the sample tempered at 450 degrees C. The fracture mode can be well explained by the competition between the cleavage fracture strength (sigma(F)) and "yield strength" (sigma(Y)). Although transgranular cleavage fracture can be found in samples tempered at 450 and 550 degrees C, the crack propagation along the lath boundaries is prevented in the sample tempered at 550 degrees C. The reason is that the number density of Cu-riched clusters at lath boundaries decreases and the segregation of Mo element at the lath boundaries is induced, which will increase the bonding energy. |
资助项目 | National Key Research and Development Program of China[2016YFB0300601] ; Liaoning Revitalization Talents Program[XLYC1907143] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDC04000000] ; Liaoning Natural Science Foundation[2020-MS-008] |
WOS研究方向 | Metallurgy & Metallurgical Engineering |
语种 | 英语 |
出版者 | CHINESE ACAD SCIENCES, INST METAL RESEARCH |
WOS记录号 | WOS:000672443800001 |
资助机构 | National Key Research and Development Program of China ; Liaoning Revitalization Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Liaoning Natural Science Foundation |
源URL | [http://ir.imr.ac.cn/handle/321006/159978] |
专题 | 金属研究所_中国科学院金属研究所 |
通讯作者 | Hu, Xiaofeng; Rong, Lijian |
作者单位 | 1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China |
推荐引用方式 GB/T 7714 | Du, Yubin,Hu, Xiaofeng,Song, Yuanyuan,et al. Effect of Nanoscale Cu-Riched Clusters on Strength and Impact Toughness in a Tempered Cu-Bearing HSLA Steel[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2021:14. |
APA | Du, Yubin,Hu, Xiaofeng,Song, Yuanyuan,Zhang, Yangpeng,&Rong, Lijian.(2021).Effect of Nanoscale Cu-Riched Clusters on Strength and Impact Toughness in a Tempered Cu-Bearing HSLA Steel.ACTA METALLURGICA SINICA-ENGLISH LETTERS,14. |
MLA | Du, Yubin,et al."Effect of Nanoscale Cu-Riched Clusters on Strength and Impact Toughness in a Tempered Cu-Bearing HSLA Steel".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2021):14. |
入库方式: OAI收割
来源:金属研究所
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