作者
Mohammad Masoomi, Scott M Thompson, Nima Shamsaei
发表日期
2017/8/1
期刊
International Journal of Machine Tools and Manufacture
卷号
118
页码范围
73-90
出版商
Pergamon
简介
A continuum-scale modeling approach is developed and employed with three-dimensional finite element analysis (FEA), for simulating the temperature response of a Ti-6Al-4V, two-layered parallelepiped with dimensions of 10×5×0.06 mm3 during Laser Powder Bed Fusion (L-PBF), a metals additive manufacturing (AM) method. The model has been validated using experimental melt pool measurements from the literature and also accounts for latent heat of fusion and effective, temperature-dependent transport properties. The discretized temperature, temperature time rate of change (i.e. cooling rate) and temperature gradient are investigated for various scan strategies and number of lasers, i.e. 1, 2 or 4. The thermal response inherent to multi-laser PBF (ML-PBF) is investigated. The number of sub-regional areas of the powder bed dedicated to individual lasers, or ‘islands’, was varied. The average, maximum …
引用总数
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M Masoomi, SM Thompson, N Shamsaei - International Journal of Machine Tools and …, 2017