喷丸强化TC4钛合金残余应力对其韧性断裂影响的数值分析

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英文篇名：Numerical Study of Effect of Residual Stress Induced by Shot Peening on Ductile Fracture of TC4 Alloy 作者：邓玉娟 ; 徐小峰 ; 贺庆 ; 张维奇 英文作者：DENG Yujuan;XU Xiaofeng;HE Qing;ZHANG Weiqi;Department of Mechanical Engineering, Quzhou College of Technology;State Grid Longyou Zhejiang Power Supply Company Ltd;Department of Mechanical Engineering, Quzhou College; 关键词：喷丸强化 ; 残余应力 ; GTN模型 ; 断裂韧性 英文关键词：shot peening;;residual stress;;GTN model;;ductile fracture 中文刊名：ZZJS 英文刊名：Foundry Technology 机构：衢州职业技术学院机电工程学院;国网浙江龙游县供电有限公司;衢州学院机械工程学院; 出版日期：2018-12-18 出版单位：铸造技术 年：2018 期：v.39;No.321 基金：新苗人才计划资助项目(QZY17X019) 语种：中文; 页：ZZJS201812077 页数：5 CN：12 ISSN：61-1134/TG 分类号：257-261

摘要

建立单丸喷丸的三维实体模型,模拟喷丸强化TC4钛合金的残余应力场。将喷丸残余应力场导入TC4钛合金拉伸试样模型,利用GTN模型分析残余应力场对拉伸试样韧性断裂行为的影响。结果表明,喷丸残余应力场能够有效提高拉伸试样的抗拉强度,但会加快试样的韧性断裂速率。
        A three-dimensional model was developed for modeling shot peening TC4 titanium alloy. The residual stress field induced by shot peening was imported into the tensile test specimen model, and GTN model was employed to study the effect of the residual stress field on the ductile fracture behavior of the tensile test specimen. The results show that the residual stress field induce with shot peening can effectively improved the tensile strength of the tensile test specimens,while the ductile fracture is quickened unfavorably.

引文

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