Research Status of Defects and Defect Treatment Technology for Laser Additive Manufactured Products

Yansheng, 姚燕生 Yao; Jun, 汪俊 Wang; Qingbo, 陈庆波 Chen; Chen, 丁晨 Ding; Jianping, 唐建平 Tang; Zhangsen, 葛张森 Ge

doi:10.3788/lop56.100004

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“…Internal cracks are common defects that appear in AM components and mainly result from thermal stresses. These defects significantly impact part performance and restrict the application of AM products [42][43][44][45]. Therefore, the occurrence of cracks must be controlled.…”

Section: Crackingmentioning

confidence: 99%

Defect inspection technologies for additive manufacturing

Chen

Peng

Kong

et al. 2021

Int. J. Extrem. Manuf.

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Additive manufacturing (AM) technology is considered one of the most promising manufacturing technologies in the aerospace and defense industries. However, AM components are known to have various internal defects, such as powder agglomeration, balling, porosity, internal cracks and thermal/internal stress, which can significantly affect the quality, mechanical properties and safety of final parts. Therefore, defect inspection methods are important for reducing manufactured defects and improving the surface quality and mechanical properties of AM components. This paper describes defect inspection technologies and their applications in AM processes. The architecture of defects in AM processes is reviewed. Traditional defect detection technology and the surface defect detection methods based on deep learning are summarized, and future aspects are suggested.

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Section: Crackingmentioning

confidence: 99%