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能量密度对选区激光熔化成型316L不锈钢薄板拉伸性能的影响
Effect of Energy Density on Tensile Properties of 316L Stainless Steel Sheet Formed by Selective Laser Melting
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- DOI:
- 作者:
- 王泽荫 岳武 张昊 张映梅 薛诚 李晶
WANG Zeyin;YUE Wu;ZHANG Hao;ZHANG Yingmei;XUE Cheng;LI Jing
- 作者单位:
- 甘肃机电职业技术学院智能控制系 兰州工业学院材料工程学院 甘肃机电职业技术学院机械工程系
Department of Intelligent Control,Gansu Institute of Mechanical&Electrical Engineering,Tianshui 741000,China;School of Materials Engineering,Lanzhou Institute of Technology,Lanzhou 730050,China;Department of Mechanical Engineering,Gansu Institute of Mechanical&Electrical Engineering,Tianshui 741000,China
- 关键词:
- 选区激光熔化成型 316L不锈钢 能量密度 拉伸性能 组织演变
selective laser melting(SLM)forming 316L stainless steel laser density tensile properties microstructure evolution
- 摘要:
- 利用选区激光熔化(SLM)技术,在不同的激光能量密度条件下制备了316L不锈钢薄片,对比研究了试样的拉伸性能和拉伸过程中微观组织的变化规律;分析了能量密度对试样拉伸性能的内在影响机制,阐明了能量密度区间的选择依据。结果表明,在合理的激光能量密度范围内,SLM成型试样的综合拉伸性能最佳;在区间外,随着能量密度增加,拉伸强度逐渐提高、伸长率逐渐降低。在拉伸过程中,断口附近的SLM组织逐渐演变为与拉伸方向近似平行的纤维状组织。
The 316L stainless steel sheets were prepared by selective laser melting(SLM)technique under different laser energy densities.The tensile properties and microstructure of the samples were compared and studied.The internal influence mechanism of the energy density on the tensile properties of the sample was analyzed,and the basis of selecting the energy density interval was clarified.The results show that the composite tensile properties of SLM molded samples are the best in the reasonable range of laser energy density.Outside the interval,the tensile strength increases and the elongation decreases with the increase of energy density.During the tensile process,the SLM structure near the fracture gradually evolves into a fibrous structure approximately parallel to the tensile direction.