The effect of thermal exposure on the microstructure and mechanical properties of multiphase AlSi12Cu4MgNi2 alloy
文献类型：期刊论文
| 作者 | Liu, Haiquan1,2; Pang, Jianchao2; Wang, Meng1,2; Li, Shouxin2; Zhang, Zhefeng1,2 |
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2020 |
| 卷号 | 159页码:9 |
| ISSN号 | 1044-5803 |
| 关键词 | Multiphase Al-Si alloy Thermal exposure Microstructural evolution Mechanical properties Damage mechanism |
| DOI | 10.1016/j.matchar.2019.110032 |
| 通讯作者 | Pang, Jianchao(jcpang@imr.ac.cn) ; Zhang, Zhefeng(zhfzhang@imr.ac.cn) |
| 英文摘要 | Microstructure evolution and mechanical properties of a multiphase AlSi12Cu4MgNi2 alloy under high temperature exposure in a wide range of 200 degrees C to 425 degrees C were investigated. The results showed that the major precipitate theta' in matrix grew coarser, then transformed to theta as the exposure temperature increased from 200 degrees C to 350 degrees C, and it precipitated again after exposed at 425 degrees C due to the natural ageing effect. Precipitates containing Mn and Si formed at 300-350 degrees C. The yield strength (YS), ultimate tensile strength (UTS) and matrix hardness decreased as the exposure temperature increased until 300 degrees C where both UTS and YS reached the minimum values, and they increased as the exposure temperature increased to 425 degrees C. The effect of Si and intermetallic phases on tensile damage mechanism was also studied using in-situ tensile tests. It was found that the damage initiated by Si and intermetallic phases cracking and the cracking increased as strain increased. The coalescence of those micro-cracks led to the macroscopic failure of the alloy. Based on the damage mechanism a relationship between strength and phases volume fraction and matrix hardness was established. The predicted strength was in good agreement with the experimental results. |
| 资助项目 | National Natural Science Foundation of China (NSFC)[51871224] ; LiaoNing Revitalization Talents Program[XLYC1808027] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE INC |
| WOS记录号 | WOS:000509819000062 |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; LiaoNing Revitalization Talents Program |
| 源URL | [http://ir.imr.ac.cn/handle/321006/137508]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Pang, Jianchao; Zhang, Zhefeng |
| 作者单位 | 1.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Mat Fatigue & Fracture Lab, 72 Wenhua Rd, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Haiquan,Pang, Jianchao,Wang, Meng,et al. The effect of thermal exposure on the microstructure and mechanical properties of multiphase AlSi12Cu4MgNi2 alloy[J]. MATERIALS CHARACTERIZATION,2020,159:9. |
| APA | Liu, Haiquan,Pang, Jianchao,Wang, Meng,Li, Shouxin,&Zhang, Zhefeng.(2020).The effect of thermal exposure on the microstructure and mechanical properties of multiphase AlSi12Cu4MgNi2 alloy.MATERIALS CHARACTERIZATION,159,9. |
| MLA | Liu, Haiquan,et al."The effect of thermal exposure on the microstructure and mechanical properties of multiphase AlSi12Cu4MgNi2 alloy".MATERIALS CHARACTERIZATION 159(2020):9. |
入库方式： OAI收割
来源：金属研究所
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