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

doi:10.1007/s41230-019-9059-9

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	Microstructural evaluation and mechanical properties of 7075 aluminum alloy prepared by controlled diffusion solidification
	Yang, Xiong 1; Li, Yuan-dong 1; Luo, Xiao-mei 1; Zhou, Hong-wei 1,2; Cai, Qi-yong 1; Li, Ming 1; Ma, Ying 1,2
刊名	CHINA FOUNDRY
	2019-07
卷号	16 期号:4 页码:238-247
关键词	primary alpha-Al phase eutectic phase solute atoms tensile strength elongation
ISSN号	1672-6421
DOI	10.1007/s41230-019-9059-9
英文摘要	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.
资助项目	National Natural Science Foundations of China[51064017][51464031]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SPRINGER SINGAPORE PTE LTD
WOS记录号	WOS:000478033800003
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/31746]
专题	发展规划处材料科学与工程学院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	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
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.