Effect of hydrogen embrittlement on dislocation emission from a semi-elliptical surface crack tip in nanometallic materials

IF 2.2 3区工程技术 Q2 MECHANICS Archive of Applied Mechanics Pub Date : 2024-08-18 DOI:10.1007/s00419-024-02674-7

Xiaoya Song, Wei Liu, Fujun Jiang, Min Yu, Xianghua Peng

{"title":"Effect of hydrogen embrittlement on dislocation emission from a semi-elliptical surface crack tip in nanometallic materials","authors":"Xiaoya Song, Wei Liu, Fujun Jiang, Min Yu, Xianghua Peng","doi":"10.1007/s00419-024-02674-7","DOIUrl":null,"url":null,"abstract":"<div><p>A theoretical model was established to investigate the interaction between hydrogen clusters and edge dislocations emitted from a semi-elliptical surface crack tip in deformed nanometallic materials. The model’s solution was obtained by using the complex method, and the influence of the concentration and location of hydrogen clusters, temperature, crack shape, material constants, and the dislocation emission angle on the critical stress intensity factor (SIFs) corresponding to the first dislocation emission from crack tips was investigated through numerical analysis. The results show that dislocations are easily emitted from the crack tip at high hydrogen concentration, and hydrogen clusters close to the crack tip will hinder the emission of dislocations from its crack tip. When considering the influence of hydrogen cluster, an increase in temperature, an extension of crack length or an increase in crack tip curvature radius can all make the emission of dislocations at the crack tip difficult, thereby reducing the toughness of the material caused by dislocation emission.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 11","pages":"3377 - 3388"},"PeriodicalIF":2.2000,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Archive of Applied Mechanics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s00419-024-02674-7","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MECHANICS","Score":null,"Total":0}

引用次数: 0

Abstract

A theoretical model was established to investigate the interaction between hydrogen clusters and edge dislocations emitted from a semi-elliptical surface crack tip in deformed nanometallic materials. The model’s solution was obtained by using the complex method, and the influence of the concentration and location of hydrogen clusters, temperature, crack shape, material constants, and the dislocation emission angle on the critical stress intensity factor (SIFs) corresponding to the first dislocation emission from crack tips was investigated through numerical analysis. The results show that dislocations are easily emitted from the crack tip at high hydrogen concentration, and hydrogen clusters close to the crack tip will hinder the emission of dislocations from its crack tip. When considering the influence of hydrogen cluster, an increase in temperature, an extension of crack length or an increase in crack tip curvature radius can all make the emission of dislocations at the crack tip difficult, thereby reducing the toughness of the material caused by dislocation emission.

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

氢脆对纳米金属材料半椭圆表面裂纹尖端位错发射的影响

建立了一个理论模型来研究变形纳米金属材料中氢簇与半椭圆表面裂纹尖端发射的边缘位错之间的相互作用。该模型的求解采用复数法，并通过数值分析研究了氢团的浓度和位置、温度、裂纹形状、材料常数和位错发射角对裂纹尖端首次发射位错所对应的临界应力强度因子（SIF）的影响。结果表明，在高氢浓度下，位错容易从裂纹尖端发射，而靠近裂纹尖端的氢团会阻碍位错从其裂纹尖端发射。在考虑氢簇的影响时，温度的升高、裂纹长度的延长或裂纹尖端曲率半径的增加都会使位错难以在裂纹尖端发射，从而降低位错发射所引起的材料韧性。

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分钟内获得全文去求助

来源期刊

Archive of Applied Mechanics 物理-力学

CiteScore

4.40

自引率

10.70%

发文量

234

审稿时长

4-8 weeks

期刊介绍： Archive of Applied Mechanics serves as a platform to communicate original research of scholarly value in all branches of theoretical and applied mechanics, i.e., in solid and fluid mechanics, dynamics and vibrations. It focuses on continuum mechanics in general, structural mechanics, biomechanics, micro- and nano-mechanics as well as hydrodynamics. In particular, the following topics are emphasised: thermodynamics of materials, material modeling, multi-physics, mechanical properties of materials, homogenisation, phase transitions, fracture and damage mechanics, vibration, wave propagation experimental mechanics as well as machine learning techniques in the context of applied mechanics.