Microstructure and Property of Inconel 738 Alloy by Selective Laser Melting Forming
Xu Jiayu; Ding Yutian; Hu Yong; Gao Yubi; Chen Jianjun; Yang Qian
2019-11
Source PublicationRARE METAL MATERIALS AND ENGINEERING
ISSN1002-185X
Volume48Issue:11Pages:3727-3734
AbstractEffect of volume energy density on the relative density, microstructure and microhardness of Inconel 738 alloy fabricated by selective laser melting (SLM) was investigated by SEM, EBSD and OM. The results show that volume energy density plays a decisive role in the SLM forming process. With the increase of the volume energy density, the relative density increases first and then decreases. The highest relative density (99.4%) can be achieved at 65.2 J/mm(3). During solidification, the microstructure of Inconel 738 alloy formed by 2.44x105 K/s SLM has obvious anisotropy in vertical direction and parallel direction. The microstructure parallel to the building direction is "chess board", the vertical to building direction is "fish scale", and overlap zone between adjacent layers and neighbor tracks is the refined cellar grains. The microstructure shows obvious texture. With the increase of the laser volume energy density, the texture in the <100> direction increases gradually. The hardness of the sample increases with the increase of the laser volume energy density. When the laser volume density is higher than 65.2 J/mm(3), the hardness (HV) value of Inconel 738 alloy is higher than that of precision casting specimen (4100 MPa).
Keywordselective laser melting (SLM) Inconel 738 alloy laser volume energy density density microstructure and property
Indexed BySCI
Language中文
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000500083600044
PublisherNORTHWEST INST NONFERROUS METAL RESEARCH
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64218
Collection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
Corresponding AuthorDing Yutian
AffiliationLanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
First Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
Corresponding Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
First Signature AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
Recommended Citation
GB/T 7714
Xu Jiayu,Ding Yutian,Hu Yong,et al. Microstructure and Property of Inconel 738 Alloy by Selective Laser Melting Forming[J]. RARE METAL MATERIALS AND ENGINEERING,2019,48(11):3727-3734.
APA Xu Jiayu,Ding Yutian,Hu Yong,Gao Yubi,Chen Jianjun,&Yang Qian.(2019).Microstructure and Property of Inconel 738 Alloy by Selective Laser Melting Forming.RARE METAL MATERIALS AND ENGINEERING,48(11),3727-3734.
MLA Xu Jiayu,et al."Microstructure and Property of Inconel 738 Alloy by Selective Laser Melting Forming".RARE METAL MATERIALS AND ENGINEERING 48.11(2019):3727-3734.
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