Thermal Stress Analysis in Selective Laser Melting of Ti6Al4V Powder Layer

Sharma, Rahul; Saxena, Shubhra; Kumar, Arvind

doi:10.1007/978-981-13-0556-6_5

Cited by 5 publications

(2 citation statements)

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“…As a result, compressive stress is generated at the melt pool boundary (the heat affected zone), as sketched in Figure 19(a). The melt pool shows no stress in its interior but the largest compressive stress at the boundary [59]. The stress evolution in multilayer melting of cyclic thermal loading can be divided into three stages: the original stress stage, the stress relief stage, and the stress building stage [60].…”

Section: Mechanical Properties Of the Machining Metamorphic Layermentioning

confidence: 99%

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Surface Integrity of Inconel 738LC Parts Manufactured by Selective Laser Melting Followed by High-speed Milling

Ren

Guo

Zhang

2023

Chin. J. Mech. Eng.

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This study is concerned with the surface integrity of Inconel 738LC parts manufactured by selective laser melting (SLM) followed by high-speed milling (HSM). In the investigation process of surface integrity, the study employs ultra-depth three-dimensional microscopy, laser scanning confocal microscopy, scanning electron microscopy, electron backscatter diffractometry, and energy dispersive spectroscopy to characterize the evolution of material microstructure, work hardening, residual stress coupling, and anisotropic effect of the building direction on surface integrity of the samples. The results show that SLM/HSM hybrid manufacturing can be an effective method to obtain better surface quality with a thinner machining metamorphic layer. High-speed machining is adopted to reduce cutting force and suppress machining heat, which is an effective way to produce better surface mechanical properties during the SLM/HSM hybrid manufacturing process. In general, high-speed milling of the SLM-built Inconel 738LC samples offers better surface integrity, compared to simplex additive manufacturing or casting.

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Section: Mechanical Properties Of the Machining Metamorphic Layermentioning

confidence: 99%

“…The compressive stress changes into tensile at the melt pool boundary, as depicted in Figure 19b. A higher residual tensile stress is induced in the solidified pool interior at a high solidification rate because of the restriction to shrinkage offered by the neighboring material [59].…”

Section: Mechanical Properties Of the Machining Metamorphic Layermentioning

confidence: 99%