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dc.creatorKim, Hoyeol
dc.creatorLiu, Zhichao
dc.creatorCong, Weilong
dc.creatorZhang, Hong-Chao
dc.date.accessioned2017-12-13T21:01:27Z
dc.date.available2017-12-13T21:01:27Z
dc.date.issued2017-11-09
dc.identifier.urihttp://hdl.handle.net/2346/73433
dc.description.abstractAISI 4140 powder was directly deposited on AISI 4140 wrought substrate using laser engineered net shaping (LENS) to investigate the compatibility of a LENS-deposited part with the substrate. Tensile testing at room temperature was performed to evaluate the interface bond performance and fracture behavior of the test specimens. All the samples failed within the as-deposited zone, indicating that the interfacial bond is stronger than the interlayer bond inside the deposit. The fracture surfaces were analyzed using scanning electron microscopy (SEM) and energy disperse X-ray spectrometry (EDS). Results show that the tensile fracture failure of the as-deposited part is primarily affected by lack-of-fusion defects, carbide precipitation, and oxide particles inclusions, which causes premature failure of the deposit by deteriorating the mechanical properties and structural integrity.en_US
dc.language.isoengen_US
dc.publisherMDPIen_US
dc.subjectfractographyen_US
dc.subjecttensile testen_US
dc.subjectlack-of-fusion defectsen_US
dc.subjectcarbides precipitationen_US
dc.subjectoxide formationen_US
dc.subjectlaser engineered net shapingen_US
dc.titleTensile Fracture Behavior and Failure Mechanism of Additively-Manufactured AISI 4140 Low Alloy Steel by Laser Engineered Net Shapingen_US
dc.typeArticleen_US


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