沉积(地质)
材料科学
金属粉末
工作(物理)
激光器
过程(计算)
金属
脉冲激光沉积
机械
复合材料
冶金
光学
热力学
薄膜
纳米技术
地质学
计算机科学
物理
古生物学
沉积物
操作系统
作者
Andrew J. Pinkerton,Waheed Ul Haq Syed,Lin Li
出处
期刊:Journal of Manufacturing Science and Engineering-transactions of The Asme
[ASME International]
日期:2007-04-09
卷期号:129 (6): 1019-1027
被引量:9
摘要
The process of coincident wire and powder deposition by laser has recently emerged in research work as a layered manufacturing method with a higher deposition rate than the established laser direct metal deposition technique and as a means of creating functionally graded metallic surface layers in a single pass. This work analytically models the process by accounting for the incoming wire and powder as virtual negative heat sources. The major assumptions of the model are confirmed experimentally and the predicted temperature profiles compared with values measured using contact and pyrometric methods. Model accuracy outside the molten zone is excellent, but this solution does not account for latent heat and intrapool circulation effects so it gives only moderate precision when extrapolated to within the melt pool. Increasing the mass feed rate to the melt pool reduces its depth and the temperature surrounding it—these effects can be quantified in three dimensions by the model.
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