IMR OpenIR
Effect of cladding parameters on microstructure and defects in direct laser metal deposition of 24CrNiMo steel
Ebrahimnia, Mohamad1; Xie, Yujiang1; Chi, Changtai2
Corresponding AuthorXie, Yujiang(Yjxie@imr.ac.cn)
2021-02-01
Source PublicationJOURNAL OF LASER APPLICATIONS
ISSN1042-346X
Volume33Issue:1Pages:12
AbstractDirect laser metal deposition of a medium carbon low alloy steel was performed on a round bar sample. Taguchi design was used to investigate the effect of three process parameters with three different levels on the microstructure and properties of single- and multitrack clad samples. Microstructural analysis showed that coalesced bainite and lath martensite exist in the clad area. Two different kinds of cracks occurred in multitrack clad samples. When laser power is not sufficient or scanning speed is high, cracks can occur in the laser clad area because of the accumulation of trapped defects inside the molten pool, e.g., inclusions, voids, and low melting point constituents alongside insufficient molten metal back-filling at interdendritic regions. These cracks can be considered as solidification cracks. Another type of cracks can occur in previous tracks of multitrack clads which actually are the heat affected zones (HAZ) of newly deposited clad tracks, because of high tensile stress on HAZ and the presence of oxide and sulfide constituents at interdendritic regions. These cracks can be considered as reheating cracks. According to the result of Taguchi design experiments, using optimum laser parameters like high laser power, medium scanning speed, and sufficient powder feed rate, crackfree clad layers can be obtained via the prevention of formation of unfavorable constituents at interdendritic regions.
Keyworddirect metal deposition laser cladding crack low alloy steel
Funding OrganizationNational Key Research and Development Program of China
DOI10.2351/7.0000214
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFB1100203]
WOS Research AreaMaterials Science ; Optics ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Optics ; Physics, Applied
WOS IDWOS:000600227600002
PublisherAMER INST PHYSICS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/158771
Collection中国科学院金属研究所
Corresponding AuthorXie, Yujiang
Affiliation1.Zhejiang Handsome Intelligent Remfg Technol Co Lt, Jiaxing 314000, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Ebrahimnia, Mohamad,Xie, Yujiang,Chi, Changtai. Effect of cladding parameters on microstructure and defects in direct laser metal deposition of 24CrNiMo steel[J]. JOURNAL OF LASER APPLICATIONS,2021,33(1):12.
APA Ebrahimnia, Mohamad,Xie, Yujiang,&Chi, Changtai.(2021).Effect of cladding parameters on microstructure and defects in direct laser metal deposition of 24CrNiMo steel.JOURNAL OF LASER APPLICATIONS,33(1),12.
MLA Ebrahimnia, Mohamad,et al."Effect of cladding parameters on microstructure and defects in direct laser metal deposition of 24CrNiMo steel".JOURNAL OF LASER APPLICATIONS 33.1(2021):12.
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