Influence of laser shock peening on microstructure and high-temperature oxidation resistance of Ti45Al8Nb alloy fabricated via laser melting deposition

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2025-01-01 DOI:10.1016/S1003-6326(24)66671-9

Lu-lu JIANG , Liang LAN , Cheng-yan BAI , Ru-yi XIN , Shuang GAO , Hao-yu WANG , Bo HE , Chao-yue CHEN , Guo-xin LU

{"title":"Influence of laser shock peening on microstructure and high-temperature oxidation resistance of Ti45Al8Nb alloy fabricated via laser melting deposition","authors":"Lu-lu JIANG , Liang LAN , Cheng-yan BAI , Ru-yi XIN , Shuang GAO , Hao-yu WANG , Bo HE , Chao-yue CHEN , Guo-xin LU","doi":"10.1016/S1003-6326(24)66671-9","DOIUrl":null,"url":null,"abstract":"<div><div>Laser shock peening (LSP) was used to enhance the high-temperature oxidation resistance of laser melting deposited Ti45Al8Nb alloy. The microstructure and high-temperature oxidation behavior of the as-deposited Ti45Al8Nb alloy before and after LSP were investigated by scanning electron microscopy, X-ray diffraction, and electron backscatter diffraction. The results indicated that the rate of mass gain in the as-deposited sample after LSP exhibited a decrease when exposed to an oxidation temperature of 900 °C, implying that LSP-treated samples exhibited superior oxidation resistance at high temperatures. A gradient structure with a fine-grain layer, a deformed-grain layer, and a coarse-grain layer was formed in the LSP-treated sample, which facilitated the diffusion of the Al atom during oxidation, leading to the formation of a dense Al<sub>2</sub>O<sub>3</sub> layer on the surface. The mechanism of improvement in the oxidation resistance of the as-deposited Ti45Al8Nb alloy via LSP was discussed.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"35 1","pages":"Pages 157-168"},"PeriodicalIF":4.7000,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions of Nonferrous Metals Society of China","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1003632624666719","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}

引用次数: 0

Abstract

Laser shock peening (LSP) was used to enhance the high-temperature oxidation resistance of laser melting deposited Ti45Al8Nb alloy. The microstructure and high-temperature oxidation behavior of the as-deposited Ti45Al8Nb alloy before and after LSP were investigated by scanning electron microscopy, X-ray diffraction, and electron backscatter diffraction. The results indicated that the rate of mass gain in the as-deposited sample after LSP exhibited a decrease when exposed to an oxidation temperature of 900 °C, implying that LSP-treated samples exhibited superior oxidation resistance at high temperatures. A gradient structure with a fine-grain layer, a deformed-grain layer, and a coarse-grain layer was formed in the LSP-treated sample, which facilitated the diffusion of the Al atom during oxidation, leading to the formation of a dense Al₂O₃ layer on the surface. The mechanism of improvement in the oxidation resistance of the as-deposited Ti45Al8Nb alloy via LSP was discussed.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.