选择性激光熔化AlSi10Mg零件的威布尔分布进行压缩试验

H. Khan, M. Dirikolu, E. Koç
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引用次数: 3

摘要

选择性激光熔化(SLM)是一种利用计算机制导激光源熔化粉末颗粒来制造三维结构的增材制造工艺。SLM工艺可以生产轻量级定制设计,具有与传统组件相当的高强度。然而,与传统构件相比,其表面纹理和部分力学性能仍不达标。工艺的不确定性会导致零件性能的不一致,即使是同时制备的零件,也会影响SLM零件的可重复性和质量。因此,基于期望属性的最可能结果设计应用程序可能包含过程不确定性。威布尔分布是一种基于统计的概率分布方法,它测量某一随机变量在某一特定值集中出现的可能性。在本研究中,Weibull分布测量了在给定的22个随机样本量下,SLM制备的AlSi10Mg样品的抗压屈服和极限强度的相对可能性(90%概率)。结果表明:该材料的抗压屈服和极限强度分别在321 ~ 382 MPa和665 ~ 883 MPa之间。
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Weibull distribution of selective laser melted AlSi10Mg parts for compression testing
Selective laser melting (SLM) is an additive manufacturing process to fabricate three-dimen- sional structures by fusing powder particles using a computer-guided laser source. The SLM process can produce lightweight bespoke designs, having high strength comparable to con- ventional components. However, the developed surface texture and some of the mechanical properties are still sub-standard compared to the conventional components. The process un- certainty can produce inconsistency in parts’ properties, even those prepared concurrently, affecting SLM parts' repeatability and quality. Therefore, designing applications based on the most probable outcome of the desired properties can embrace process uncertainty. Weibull distribution is a statistical-based probability distribution method that measures the likelihood of the values’ occurrence of any random variable falling in a specific set of values. In this study, the Weibull distribution measured the relative likelihood (90% probability) of the compressive yield, and ultimate strength of the SLM prepared AlSi10Mg samples in a given 22 random sample size. The results showed that the compressive yield and ultimate strength fall between 321 MPa to 382 MPa and 665 MPa to 883 MPa.
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