中文版 | English
Title

Tailoring microstructure and mechanical properties of ?-solidifying TiAl alloy fabricated by laser-engineered net shaping through heat treatment

Author
Corresponding AuthorZhang, Ming-Xing; Yan, Ming
Publication Years
2023-04-05
DOI
Source Title
ISSN
2214-8604
EISSN
2214-7810
Volume67
Abstract
beta-solidifying TiAl alloy, an advanced gamma-TiAl based alloy, has emerged as a lightweight candidate for high temperature applications in turbine engines. To facilitate the design freedom and manufacturing efficiency, laserengineered net shaping (LENS) is considered as a promising method to fabricate beta-solidifying TiAl alloy components. However, this alloy suffers from cracking during the printing process due to its high brittleness. Hence, grain refinement was introduced to overcome this issue. But, the grain refinement leads to reduction in creep resistance at elevated temperatures. To restore the creep-resistant performance, postproduction heat treatment is required to tailor the mechanical properties of the beta-solidifying TiAl alloy. In the present work, the as-printed TiAl alloy is subject to heat treatment with different processes to maximize the formation of alpha 2/gamma lamellar structure that corresponds to higher creep resistance. Upon characterizations of the heat treated TiAl alloy samples in terms of microstructure, compressive properties at room temperature and creep resistance at 800 degrees C, an optimized two-step heat treatment process comprising of annealing at 1350 degrees C for 1 h followed by air cooling and a subsequent stabilization treatment at 850 degrees C for 6 h is developed. The resultant microstructure consisting of fully lamellar structure with nano-scale lamellar spacing leads to a dramatical increase in the room temperature plasticity of the alloy with respect to the as-printed's, and high creep resistance at 800 degrees C with applied stress of 150 MPa, which is comparable to the alloys fabricated with conventional casting and wrought technologies.
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
National Natural Science Foundation of China["51971108","52271032"] ; Guangdong Basic and Applied Basic Research Foundation[2020B1515120013] ; State Key Laboratory of Advanced Welding and Joining[AWJ-22M01] ; Shenzhen Science and Technology Innovation Commission[JCYJ20180504165824643] ; ARC Discovery Project program[DP210103162]
WOS Research Area
Engineering ; Materials Science
WOS Subject
Engineering, Manufacturing ; Materials Science, Multidisciplinary
WOS Accession No
WOS:000956919300001
Publisher
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/523996
DepartmentDepartment of Materials Science and Engineering
Affiliation
1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen Key Lab Addit Mfg High Performance Mat, Shenzhen 518055, Peoples R China
2.Univ Queensland, Sch Mech & Min Engn, St Lucia, Qld 4072, Australia
3.Southern Univ Sci & Technol, Jiaxing Res Inst, Jiaxing 314031, Peoples R China
First Author AffilicationDepartment of Materials Science and Engineering
Corresponding Author AffilicationDepartment of Materials Science and Engineering;  Southern University of Science and Technology
First Author's First AffilicationDepartment of Materials Science and Engineering
Recommended Citation
GB/T 7714
Huang, Danni,Yao, Xiyu,Zhou, Yinghao,et al. Tailoring microstructure and mechanical properties of ?-solidifying TiAl alloy fabricated by laser-engineered net shaping through heat treatment[J]. ADDITIVE MANUFACTURING,2023,67.
APA
Huang, Danni.,Yao, Xiyu.,Zhou, Yinghao.,Zhu, Qiang.,Tang, Yaxin.,...&Yan, Ming.(2023).Tailoring microstructure and mechanical properties of ?-solidifying TiAl alloy fabricated by laser-engineered net shaping through heat treatment.ADDITIVE MANUFACTURING,67.
MLA
Huang, Danni,et al."Tailoring microstructure and mechanical properties of ?-solidifying TiAl alloy fabricated by laser-engineered net shaping through heat treatment".ADDITIVE MANUFACTURING 67(2023).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Export to Excel
Export to Csv
Altmetrics Score
Google Scholar
Similar articles in Google Scholar
[Huang, Danni]'s Articles
[Yao, Xiyu]'s Articles
[Zhou, Yinghao]'s Articles
Baidu Scholar
Similar articles in Baidu Scholar
[Huang, Danni]'s Articles
[Yao, Xiyu]'s Articles
[Zhou, Yinghao]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Huang, Danni]'s Articles
[Yao, Xiyu]'s Articles
[Zhou, Yinghao]'s Articles
Terms of Use
No data!
Social Bookmark/Share
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.