Microstructural evaluation and mechanical properties of 7075 aluminum alloy prepared by controlled diffusion solidification

doi:10.1007/s41230-019-9059-9

	Microstructural evaluation and mechanical properties of 7075 aluminum alloy prepared by controlled diffusion solidification
	Yang, Xiong 1; Li, Yuan-dong1 ; Luo, Xiao-mei 1; Zhou, Hong-wei 1,2; Cai, Qi-yong 1; Li, Ming 1; Ma, Ying1,2
	2019-07-01
发表期刊	CHINA FOUNDRY
ISSN	1672-6421
卷号	16 期号:4 页码:238-247
摘要	In the present work, 7075 aluminum alloy (Al-Zn-Mg-Cu) was produced by both conventional casting (CC) and controlled diffusion solidification (CDS) methods. Each sample was subjected to different heat-treatment conditions: as-cast, T4, and T6; and their microstructural and mechanical properties were investigated by optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). It was found that CDS promoted the formation of non-dendritic primary alpha-Al phase and reduced shrinkage porosity, thus resulting in improved mechanical properties. In addition, the eutectic phase of the CDS samples mainly consisted of T(Al-ZnMg-Cu) phase, which manifested a well-developed lamellar eutectic structure. However, in the CC samples, the T(Al-Zn-Mg-Cu) phase was composed of rod-like eutectics. Moreover, the theta(Al2Cu) eutectic contents in the CC samples were greater than those in the CDS samples. Each element in the CC samples had an obvious change in the grain boundary, whereas the change in element content in the CDS samples was gradual. Therefore, the non-dendritic morphology of the primary phase and the presence of rod-like eutectics in the matrix of the CDS samples led to enhanced tensile strength and elongation under different heat treatment conditions.
关键词	primary alpha-Al phase eutectic phase solute atoms tensile strength elongation
DOI	10.1007/s41230-019-9059-9
收录类别	SCIE
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000478033800003
出版者	SPRINGER SINGAPORE PTE LTD
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/155338
专题	材料科学与工程学院
通讯作者	Li, Yuan-dong
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China; 2.Lanzhou Univ Technol, Minist Educ, Key Lab Nonferrous Met Alloys & Proc, Lanzhou 730050, Gansu, Peoples R China
第一作者单位	省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室
第一作者的第一单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 GB/T 7714	Yang, Xiong,Li, Yuan-dong,Luo, Xiao-mei,et al. Microstructural evaluation and mechanical properties of 7075 aluminum alloy prepared by controlled diffusion solidification[J]. CHINA FOUNDRY,2019,16(4):238-247.
APA	Yang, Xiong.,Li, Yuan-dong.,Luo, Xiao-mei.,Zhou, Hong-wei.,Cai, Qi-yong.,...&Ma, Ying.(2019).Microstructural evaluation and mechanical properties of 7075 aluminum alloy prepared by controlled diffusion solidification.CHINA FOUNDRY,16(4),238-247.
MLA	Yang, Xiong,et al."Microstructural evaluation and mechanical properties of 7075 aluminum alloy prepared by controlled diffusion solidification".CHINA FOUNDRY 16.4(2019):238-247.