Study of the effect of defects on fatigue life prediction of additive manufactured Ti-6Al-4V by combined use of micro-computed tomography and fracture-mechanics-based simulation

材料科学 计算机断层摄影术 断裂(地质) 断裂力学 结构工程 复合材料 工程类 医学 外科
作者
Shiwei Han,Tien Dung Dinh,Ives De Baere,Matthieu N. Boone,Iván Josipovic,Wim Van Paepegem
出处
期刊:International Journal of Fatigue [Elsevier BV]
卷期号:180: 108110-108110
标识
DOI:10.1016/j.ijfatigue.2023.108110
摘要

The significant variability in the high-cycle fatigue of additive manufactured (AM) Ti-6Al-4V has impeded its confident application in fatigue-critical components. One of the major factors responsible for the fatigue-life variability is the presence of intrinsic defects left by the additive manufacturing process. The goal of this work is to investigate the fatigue-life variability as the function of (i) the locations of the defects, viz., internally or on the surface, (ii) the distance to the free surface if it is an internal defect, (iii) the sizes of defects and (iv) the accurate stress at the defect locations. In this study, AM Ti-6Al-4V specimens were firstly scanned by micro-computed tomography, then tested in air under high-cycle fatigue with stereo-digital image correlation, and finally examined post-mortem using scanning electron microscopy. Defects detected by micro-computed tomography have been mapped with the local stress reproduced from the stereo-digital image correlation measurement and correlated with the defects found in post-mortem fractography by scanning electron microscope. Wide variation in the fatigue life was indeed found from the tests and more than half of the tested specimens initiated cracks from the internal defects. A fracture mechanics-based approach was developed to account not only for the defect sizes but also for different crack growth rates between surface cracks in air and internal cracks in vacuum. In comparison with the nominal stress-based approach, the scatter of the fatigue life prediction can be significantly reduced from ± 60 times to ± 6 times by applying this fracture mechanics-based methodology.
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
刚刚
DijiaXu应助背后煎蛋采纳,获得10
1秒前
瓜瓜猫完成签到,获得积分10
1秒前
思源应助yu采纳,获得10
1秒前
束缚发布了新的文献求助10
1秒前
一杯月光发布了新的文献求助10
2秒前
lfzw发布了新的文献求助30
2秒前
hhchhcmxhf完成签到,获得积分10
2秒前
jam完成签到,获得积分10
4秒前
ww发布了新的文献求助10
4秒前
hss完成签到,获得积分10
4秒前
Gia发布了新的文献求助10
4秒前
苏梗完成签到 ,获得积分10
5秒前
SussClay完成签到,获得积分10
6秒前
妮妮发布了新的文献求助10
7秒前
万事胜意完成签到,获得积分20
7秒前
踏实志泽完成签到,获得积分10
8秒前
我是老大应助Babe1934采纳,获得10
8秒前
852应助王珏采纳,获得10
8秒前
我是老大应助半夏采纳,获得10
10秒前
10秒前
蕊子发布了新的文献求助30
10秒前
含蓄寄文关注了科研通微信公众号
10秒前
10秒前
10秒前
一杯月光完成签到,获得积分10
11秒前
长情的以云完成签到,获得积分10
12秒前
lm发布了新的文献求助10
13秒前
13秒前
束缚完成签到,获得积分10
14秒前
万事胜意发布了新的文献求助10
14秒前
kaige66完成签到,获得积分10
14秒前
biubiuu发布了新的文献求助10
15秒前
ei123完成签到,获得积分10
17秒前
18秒前
PDIF-CN2完成签到,获得积分10
18秒前
姜姜发布了新的文献求助10
18秒前
19秒前
满意的醉蝶完成签到,获得积分10
20秒前
卷aaaa完成签到,获得积分10
20秒前
高分求助中
Ophthalmic Equipment Market by Devices(surgical: vitreorentinal,IOLs,OVDs,contact lens,RGP lens,backflush,diagnostic&monitoring:OCT,actorefractor,keratometer,tonometer,ophthalmoscpe,OVD), End User,Buying Criteria-Global Forecast to2029 2000
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Cognitive Neuroscience: The Biology of the Mind (Sixth Edition) 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 588
Christian Women in Chinese Society: The Anglican Story 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 3961269
求助须知:如何正确求助?哪些是违规求助? 3507536
关于积分的说明 11136688
捐赠科研通 3239991
什么是DOI,文献DOI怎么找? 1790625
邀请新用户注册赠送积分活动 872449
科研通“疑难数据库(出版商)”最低求助积分说明 803199