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Microstructure and Mechanical Properties of Laser Deposition Repaired Cast ZL114A Aluminium Alloy
Alternative TitleMicrostructure and Mechanical Properties of Laser Deposition Repaired Cast ZL114A Aluminium Alloy
Qin Lanyun; Pang Shuang; Yang Guang; Wang Chao; Wang Wei
2017
Source PublicationRARE METAL MATERIALS AND ENGINEERING
ISSN1002-185X
Volume46Issue:6Pages:1596-1601
AbstractZL114A cast aluminum alloy with pre-groove damage was repaired by laser deposition repair (LDR). Microstructure and distribution law of laser deposition repaired zone before and after heat treatment were analyzed, and then microhardness and room temperature tensile properties of the samples were tested. The results show that a good metallurgical combination is formed between the repaired zone and the substrate. At the bottom of the deposition layer, alpha-Al columnar dendrites, which are approximately parallel to the normal directions of the fusion line appear with epitaxial growth feature. The primary dendrite arm spacing is about 15.7 mu m, and the distance between secondary dendrites is about 5.27 mu M. Eutectic structure presents as bifurcated rod or block, and continuously distributes in the gaps among dendrite crystals, and alpha-Al columnar dendrites transforms into equiaxed crystal at the top of the last deposition layer. After the heat treatment, secondary dendrite arm of columnar dendrite is expansive because of atomic diffusion, and eutectic Si granulation is clear, the particle size is about 4.93 mu m, and part of them distribute uniformly on both sides of primary dendritic arm. The hardness of repaired area increases by 1.6 times compared with that of the deposited sample after heat treatment, and the room temperature tensile properties are better than those of cast substrates.
Keywordlaser deposition repair (LDR) ZL114A aluminium alloy hardness tensile property
Indexed ByCSCD
Language英语
CSCD IDCSCD:6014011
Citation statistics
Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/157865
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
Qin Lanyun,Pang Shuang,Yang Guang,et al. Microstructure and Mechanical Properties of Laser Deposition Repaired Cast ZL114A Aluminium Alloy[J]. RARE METAL MATERIALS AND ENGINEERING,2017,46(6):1596-1601.
APA Qin Lanyun,Pang Shuang,Yang Guang,Wang Chao,&Wang Wei.(2017).Microstructure and Mechanical Properties of Laser Deposition Repaired Cast ZL114A Aluminium Alloy.RARE METAL MATERIALS AND ENGINEERING,46(6),1596-1601.
MLA Qin Lanyun,et al."Microstructure and Mechanical Properties of Laser Deposition Repaired Cast ZL114A Aluminium Alloy".RARE METAL MATERIALS AND ENGINEERING 46.6(2017):1596-1601.
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