Effect of laser shock peening and age-hardening treatment on hydrogen embrittlement of ultra-strength Cu-Ti-Fe alloy

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-04-28 DOI:10.1016/j.vacuum.2025.114371

Chuanjun Li , Zhiqiang Wang , Dengdi Zhang , Heming Liu , Jingping Ma

{"title":"Effect of laser shock peening and age-hardening treatment on hydrogen embrittlement of ultra-strength Cu-Ti-Fe alloy","authors":"Chuanjun Li , Zhiqiang Wang , Dengdi Zhang , Heming Liu , Jingping Ma","doi":"10.1016/j.vacuum.2025.114371","DOIUrl":null,"url":null,"abstract":"<div><div>The microstructure, grain structure, and hydrogen embrittlement of age-hardened and laser-shock-peened Cu-Ti-Fe alloys were investigated in this study. The alloys were age-hardened at 650 and 750 °C for 240 and 2400 min. Also, the age-hardened alloys were surface-modified by the laser shock peening (LSP) process with laser densities of 5.5 and 9 GW/cm<sup>2</sup>. The microstructural observation revealed the α-Cu<sub>4</sub>Ti and β-Cu<sub>4</sub>Ti phases in all alloys. Additionally, higher aging temperatures and times resulted in a higher fraction of precipitates, especially the β-Cu<sub>4</sub>Ti at grain boundaries. Furthermore, the hardness of alloys increased at higher aging temperature and longer aging times. Similarly, the higher laser density of LSP process resulted in a larger hardness increment. The peened surfaces showed grain refinement. The smaller grain size was obtained by applying a laser density of 9 GW/cm<sup>2</sup>. Also, peened surfaces reduced the hydrogen embrittlement. The crack propagation and cleavage fracture declined in peened surfaces, especially due to higher laser density.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"239 ","pages":"Article 114371"},"PeriodicalIF":3.8000,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vacuum","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0042207X25003616","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The microstructure, grain structure, and hydrogen embrittlement of age-hardened and laser-shock-peened Cu-Ti-Fe alloys were investigated in this study. The alloys were age-hardened at 650 and 750 °C for 240 and 2400 min. Also, the age-hardened alloys were surface-modified by the laser shock peening (LSP) process with laser densities of 5.5 and 9 GW/cm². The microstructural observation revealed the α-Cu₄Ti and β-Cu₄Ti phases in all alloys. Additionally, higher aging temperatures and times resulted in a higher fraction of precipitates, especially the β-Cu₄Ti at grain boundaries. Furthermore, the hardness of alloys increased at higher aging temperature and longer aging times. Similarly, the higher laser density of LSP process resulted in a larger hardness increment. The peened surfaces showed grain refinement. The smaller grain size was obtained by applying a laser density of 9 GW/cm². Also, peened surfaces reduced the hydrogen embrittlement. The crack propagation and cleavage fracture declined in peened surfaces, especially due to higher laser density.

查看原文本刊更多论文

激光冲击强化和时效硬化处理对超强Cu-Ti-Fe合金氢脆的影响

研究了时效硬化和激光冲击强化后Cu-Ti-Fe合金的显微组织、晶粒组织和氢脆特性。在650℃和750℃条件下，分别对合金进行240和2400 min时效硬化处理。同时，对合金进行激光冲击强化（LSP）处理，激光密度分别为5.5和9 GW/cm2。显微组织观察表明，所有合金均存在α-Cu4Ti和β-Cu4Ti相。时效温度和时效时间越长，析出相的比例越高，尤其是晶界处的β-Cu4Ti析出相。随着时效温度的升高和时效时间的延长，合金的硬度有所提高。同样，激光密度越高，LSP工艺的硬度增量越大。喷丸表面晶粒细化。激光密度为9 GW/cm2，获得了较小的晶粒尺寸。此外，喷丸表面减少了氢脆。激光密度增大后，表面裂纹扩展和解理断裂明显减少。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.