Coupling effects of microstructure and defects on the fatigue properties of laser powder bed fusion Ti-6Al-4V

微观结构 材料科学 极限抗拉强度 复合材料 疲劳极限 压力(语言学) 层状结构 联轴节(管道) 融合 语言学 哲学
作者
Zhan Qu,Z.J. Zhang,Yansong Zhu,R. Liu,Shenglu Lu,S.J. Li,Q.Q. Duan,Baosen Zhang,M.X. Zhao,J. Eckert,Zhifeng Zhang
出处
期刊:Additive manufacturing [Elsevier BV]
卷期号:61: 103355-103355 被引量:29
标识
DOI:10.1016/j.addma.2022.103355
摘要

The coupling effects of microstructure and macro-scale defects are significant for the fatigue properties of metallic materials. However, this correlation is still vague for additively manufactured materials. Therefore, the fatigue properties and microstructure of laser powder bed fusion (LPBF) Ti-6Al-4V were studied in this work, it is found that there is an anomalous trade-off relationship between the hardness and the high-cycle fatigue properties. Surprisingly, the softest microstructure has better fatigue resistance, i.e., its tensile strength is reduced by over 23%, while its fatigue strength is increased by ∼28%, compared with the hardest stress-relieved state. Statistical analysis on the fatigue source morphologies indicates that the hard α′ microstructure is sensitive to lack of fusion (LOF)-type defects while the soft lamellar (α + β) microstructure is sensitive to pore-type defects, which may be related to the higher tolerance concerning sharp defects for the soft microstructure relative to the hard one. Through considering the transition of the fatigue cracking mechanism and the effect of the microstructure, a fatigue life prediction model has been developed based on the Murakami theory, which does not only give a sound explanation for the trade-off relationship but is also in good agreement with the fatigue data for different defect characteristics and microstructure states at different applied stress amplitudes.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
科研小白完成签到,获得积分10
1秒前
文艺孱关注了科研通微信公众号
1秒前
QWQ完成签到,获得积分10
2秒前
哈儿的跟班完成签到,获得积分10
2秒前
3秒前
电机小学生完成签到,获得积分10
3秒前
奶黄包完成签到 ,获得积分10
4秒前
4秒前
zhenya完成签到,获得积分10
4秒前
5秒前
5秒前
暴躁的海ge完成签到,获得积分10
6秒前
6秒前
小谢完成签到,获得积分10
7秒前
从容乌完成签到 ,获得积分10
7秒前
甲乙丙丁完成签到,获得积分10
7秒前
7秒前
如意的尔蝶完成签到,获得积分10
7秒前
儒雅的菠萝吹雪完成签到,获得积分10
8秒前
AN完成签到,获得积分10
9秒前
苹果完成签到 ,获得积分10
9秒前
淡然钢笔完成签到,获得积分10
9秒前
liuyuqi完成签到,获得积分20
9秒前
碧蓝的安柏完成签到,获得积分10
9秒前
9秒前
卓头OvQ完成签到,获得积分10
9秒前
Khr1stINK完成签到,获得积分10
10秒前
暗栀发布了新的文献求助10
10秒前
酷酷阑香发布了新的文献求助10
10秒前
含蓄绿兰完成签到,获得积分10
10秒前
甲乙丙丁发布了新的文献求助10
11秒前
john完成签到,获得积分10
11秒前
11秒前
爽o发布了新的文献求助10
11秒前
En应助小马baby采纳,获得10
12秒前
臭屁大王完成签到,获得积分10
12秒前
12秒前
求知完成签到,获得积分10
13秒前
巨汉完成签到,获得积分10
13秒前
双色瞳的罗严塔尔完成签到,获得积分10
13秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
Immigrant Incorporation in East Asian Democracies 600
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3968637
求助须知:如何正确求助?哪些是违规求助? 3513552
关于积分的说明 11168493
捐赠科研通 3248935
什么是DOI,文献DOI怎么找? 1794554
邀请新用户注册赠送积分活动 875188
科研通“疑难数据库(出版商)”最低求助积分说明 804691