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The effect of thermal exposure on the microstructure and mechanical properties of multiphase AlSi12Cu4MgNi2 alloy
Liu, Haiquan1,2; Pang, Jianchao1; Wang, Meng1,2; Li, Shouxin1; Zhang, Zhefeng1,2
Corresponding AuthorPang, Jianchao(jcpang@imr.ac.cn) ; Zhang, Zhefeng(zhfzhang@imr.ac.cn)
2020
Source PublicationMATERIALS CHARACTERIZATION
ISSN1044-5803
Volume159Pages:9
AbstractMicrostructure 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.
KeywordMultiphase Al-Si alloy Thermal exposure Microstructural evolution Mechanical properties Damage mechanism
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; LiaoNing Revitalization Talents Program
DOI10.1016/j.matchar.2019.110032
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[51871224] ; LiaoNing Revitalization Talents Program[XLYC1808027]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS IDWOS:000509819000062
PublisherELSEVIER SCIENCE INC
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/137506
Collection中国科学院金属研究所
Corresponding AuthorPang, Jianchao; Zhang, Zhefeng
Affiliation1.Chinese Acad Sci, Inst Met Res, Mat Fatigue & Fracture Lab, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
Recommended Citation
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.
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