| Effect of cladding parameters on microstructure and defects in direct laser metal deposition of 24CrNiMo steel | |
| Ebrahimnia, Mohamad1; Xie, Yujiang1; Chi, Changtai2 | |
| Corresponding Author | Xie, Yujiang(Yjxie@imr.ac.cn) |
| 2021-02-01 | |
| Source Publication | JOURNAL OF LASER APPLICATIONS
 |
| ISSN | 1042-346X |
| Volume | 33Issue:1Pages:12 |
| Abstract | Direct 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. |
| Keyword | direct metal deposition laser cladding crack low alloy steel |
| Funding Organization | National Key Research and Development Program of China |
| DOI | 10.2351/7.0000214 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2016YFB1100203] |
| WOS Research Area | Materials Science ; Optics ; Physics |
| WOS Subject | Materials Science, Multidisciplinary ; Optics ; Physics, Applied |
| WOS ID | WOS:000600227600002 |
| Publisher | AMER INST PHYSICS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/158771 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Xie, Yujiang |
| Affiliation | 1.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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