中文版 | English
Title

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

Author
Corresponding AuthorZhang, G. Q.; Yan, M.
Publication Years
2019-10-30
DOI
Source Title
ISSN
0925-8388
EISSN
1873-4669
Volume807
Abstract
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.
Keywords
URL[Source Record]
Indexed By
SCI ; EI
Language
English
Funding Project
National Science Foundation of Guangdong Province[2016A030313756]
WOS Research Area
Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS Subject
Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS Accession No
WOS:000483692200029
Publisher
EI Accession Number
20193307304133
EI Keywords
Advanced Analytics ; Alloying elements ; Computerized tomography ; Cracking (chemical) ; Cracks ; Mechanisms ; Melting ; Nickel alloys ; Superalloys ; Tensile strength ; Turbomachine blades
ESI Classification Code
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
SUSTech Authorship
Corresponding
ESI Research Field
MATERIALS SCIENCE
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:6
Document TypeJournal Article
Identifierhttps://kc.sustech.edu.cn/handle/2SGJ60CL/25094
DepartmentDepartment of Materials Science and Engineering
Affiliation
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
Corresponding Author AffilicationDepartment of Materials Science and Engineering
Recommended Citation
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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