Effect of Process Parameters on Defects, Melt Pool Shape, Microstructure, and Tensile Behavior of 316L Stainless Steel Produced by Selective Laser Melting
文献类型:期刊论文
作者 | Jiang HZ(蒋华臻)2,3; Li ZY(李正阳)2; Feng T1; Wu PY1; Chen QS(陈启生)2,3; Feng YL1; Chen LF1; Hou JY(侯静宇)2,3; Xu HJ2; Li ZY(李正阳) |
刊名 | ACTA METALLURGICA SINICA-ENGLISH LETTERS |
出版日期 | 2020-10-13 |
页码 | 16 |
ISSN号 | 1006-7191 |
关键词 | Selective laser melting Defects Melt pool shape Primary dendrite spacing Mechanical properties 316L stainless steel |
DOI | 10.1007/s40195-020-01143-8 |
通讯作者 | Li, Zheng-Yang(zyli@imech.ac.cn) ; Chen, Qi-Sheng(qschen@imech.ac.cn) |
英文摘要 | Previous studies have revealed that laser power and energy density are significant factors affecting the quality of parts manufactured by selective laser melting (SLM). The normalized equivalent densityE(0)* and dimensionless laser powerq*, which can be regarded as a progress on the understanding of the corresponding dimensional quantities, are adopted in this study to examine the defects, melt pool shape, and primary dendrite spacing of the SLM-manufactured 316L stainless steel, because it reflects the combined effect of process parameters and material features. It is found that the number of large defects decreases with increasingE(0)* due to enough heat input during the SLM process, but it will show an increasing trend when excessive heat input (i.e., utilizing a highE(0)*) is imported into the powder bed. Theq* plays an important role in controlling maximum temperature rising in the SLM process, and in turn, it affects the number of large defects. A largeq* value results in a low value of absolute frequency of large defects, whereas a maximum value of absolute frequency of large defects is achieved at a lowq* even ifE(0)* is very high. The density of the built parts is greater at a higherq* whenE(0)* remains constant. Increasing the melt pool depth at relatively low value ofE(0)* enhances the relative density of the parts. A narrow, deep melt pool can be easily generated at a highq* whenE(0)* is sufficiently high, but it may increase melt pool instability and cause keyhole defects. It is revealed that a lowE(0)* can lead to a high cooling rate, which results in a refined primary dendrite spacing. Relatively lowE(0)* is emphasized in selecting the process parameters for the tensile test sample fabrication. It shows that excellent tensile properties, namely ultimate tensile strength, yield strength, and elongation to failure of 773 MPa, 584 MPa, and 46%, respectively, can be achieved at a relatively lowE(0)* without heat treatment. |
分类号 | 二类 |
WOS关键词 | POWDER-BED FUSION ; HIGH-STRENGTH ; DENSITY ; DENSIFICATION ; PERFORMANCE ; DEPENDENCE ; AUSTENITE ; MECHANISM ; DUCTILITY ; DIAGRAMS |
资助项目 | National Natural Science Foundation of China[11772344] ; National Key R&D Program of China[2016YFB1100700] |
WOS研究方向 | Metallurgy & Metallurgical Engineering |
语种 | 英语 |
WOS记录号 | WOS:000578860300002 |
资助机构 | National Natural Science Foundation of China ; National Key R&D Program of China |
其他责任者 | Li, Zheng-Yang ; Chen, Qi-Sheng |
源URL | [http://dspace.imech.ac.cn/handle/311007/85375] |
专题 | 力学研究所_先进制造工艺力学重点实验室 力学研究所_国家微重力实验室 |
作者单位 | 1.Beijing E Plus 3D Technol Co LTD, Beijing 102299, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100190, Peoples R China; |
推荐引用方式 GB/T 7714 | Jiang HZ,Li ZY,Feng T,et al. Effect of Process Parameters on Defects, Melt Pool Shape, Microstructure, and Tensile Behavior of 316L Stainless Steel Produced by Selective Laser Melting[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2020:16. |
APA | 蒋华臻.,李正阳.,Feng T.,Wu PY.,陈启生.,...&Chen QS.(2020).Effect of Process Parameters on Defects, Melt Pool Shape, Microstructure, and Tensile Behavior of 316L Stainless Steel Produced by Selective Laser Melting.ACTA METALLURGICA SINICA-ENGLISH LETTERS,16. |
MLA | 蒋华臻,et al."Effect of Process Parameters on Defects, Melt Pool Shape, Microstructure, and Tensile Behavior of 316L Stainless Steel Produced by Selective Laser Melting".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2020):16. |
入库方式: OAI收割
来源:力学研究所
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