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题名

Selective laser melting of the hard-to-weld IN738LC superalloy: Efforts to mitigate defects and the resultant microstructural and mechanical properties

作者
通讯作者Zhang, G. Q.; Yan, M.
发表日期
2019-10-30
DOI
发表期刊
ISSN
0925-8388
EISSN
1873-4669
卷号807
摘要
IN738LC is an important high performance Ni-based superalloy. Its additive manufacturing via selective laser melting (SLM), however, is rather challenging due to the cracking-prone nature of the alloy whose chemical composition contains high amount of alloying elements namely Ti and Al. We address this significant problem by this study through systematic investigations on the pre-processing, SLM optimization, and post-processing of the material, as well as using advanced analytical tools such as micro-CT. A comprehensive process map for achieving crack-free, high-density samples (similar to 99.76%) is provided. Mechanisms influencing densification, cracking and mechanical properties are discussed. Excellent mechanical properties have been achieved at both room temperature (895/1010 MPa as the yield and tensile strengths) and elevated temperature of 850 degrees C (720 MPa tensile strength and 14.4% elongation). A demonstrative as-printed turbine blade is also presented, highlighting the capability of SLM to simultaneously achieve excellent mechanical property and good geometric integrity. (C) 2019 Elsevier B.V. All rights reserved.
关键词
相关链接[来源记录]
收录类别
SCI ; EI
语种
英语
学校署名
通讯
资助项目
National Science Foundation of Guangdong Province[2016A030313756]
WOS研究方向
Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目
Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号
WOS:000483692200029
出版者
EI入藏号
20193307304133
EI主题词
Advanced Analytics ; Alloying elements ; Computerized tomography ; Cracking (chemical) ; Cracks ; Mechanisms ; Melting ; Nickel alloys ; Superalloys ; Tensile strength ; Turbomachine blades
EI分类号
Metallurgy and Metallography:531 ; Metallurgy:531.1 ; Nickel Alloys:548.2 ; Mechanisms:601.3 ; Computer Applications:723.5 ; Chemical Reactions:802.2 ; Chemical Operations:802.3
ESI学科分类
MATERIALS SCIENCE
来源库
Web of Science
引用统计
被引频次[WOS]:74
成果类型期刊论文
条目标识符http://kc.sustech.edu.cn/handle/2SGJ60CL/25094
专题工学院_材料科学与工程系
作者单位
1.Shenzhen Univ, Coll Mechatron & Control Engn, Guangdong Prov Key Lab Micro Nano Optomechatron E, Shenzhen 518060, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen Key Lab Addit Mfg High Performance Mat, Shenzhen 518055, Peoples R China
3.Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
通讯作者单位材料科学与工程系
推荐引用方式
GB/T 7714
Wang, H.,Zhang, X.,Wang, G. B.,et al. Selective laser melting of the hard-to-weld IN738LC superalloy: Efforts to mitigate defects and the resultant microstructural and mechanical properties[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,807.
APA
Wang, H..,Zhang, X..,Wang, G. B..,Shen, J..,Zhang, G. Q..,...&Yan, M..(2019).Selective laser melting of the hard-to-weld IN738LC superalloy: Efforts to mitigate defects and the resultant microstructural and mechanical properties.JOURNAL OF ALLOYS AND COMPOUNDS,807.
MLA
Wang, H.,et al."Selective laser melting of the hard-to-weld IN738LC superalloy: Efforts to mitigate defects and the resultant microstructural and mechanical properties".JOURNAL OF ALLOYS AND COMPOUNDS 807(2019).
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