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Ti­6Al­4V钛合金陶瓷湿喷丸表面强化微观组织与疲劳性能

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Indexed by:期刊论文

Date of Publication:2013-01-15

Journal:中国有色金属学报

Included Journals:EI、PKU、ISTIC、CSCD

Volume:23

Issue:1

Page Number:122-127

ISSN No.:1004-0609

Key Words:Ti­6Al­4V 湿喷丸 微观组织 残余应力 疲劳性能 Ti­6Al­4V alloy wet shot peening microstructure residual stress fatigue property

Abstract:采用陶瓷湿喷丸强化工艺对Ti­6Al­4V合金进行表面处理.结果表明:经湿喷丸后,材料表面硬度由330HV提高到416HV;表面粗糙度由原始的0.35μm增大到0.48μm,较传统的干喷丸相比,粗糙度值小一个数量级;表面残余应力达−749 MPa,且最大压应力位于最表层,残余压应力层深度约为120μm;拉−拉疲劳强度由605 MPa提高到680 MPa.微观组织分析表明:喷丸处理后钛合金表层位错密度显著增加,晶粒细化,基面织构由(100)向(101)转变.陶瓷湿喷丸强化处理可提高Ti­6Al­4V合金的疲劳强度.

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