亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整的填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

Evaluation of Phase Transformation Strain and Its Influence on Residual Stress Generation in Laser Welded Ti–6Al–4V Alloy

材料科学 残余应力 无扩散变换 极限抗拉强度 马氏体 压力(语言学) 相(物质) 焊接 复合材料 合金 钛合金 冶金 微观结构 化学 哲学 有机化学 语言学
作者
Bikash Kumar,Swarup Bag,M. Ruhul Amin
出处
期刊:Journal of Manufacturing Science and Engineering-transactions of The Asme [ASM International]
卷期号:144 (12) 被引量:8
标识
DOI:10.1115/1.4054903
摘要

Abstract The assessment of welding-induced residual stress is always of significant interest due to its adverse effect on the structural stability and mechanical performance of the welded structure. Incorporation of intricate phenomena, in particular, thermal gradient, phase development, volumetric dilation, and phase transformation strain during FE modelling, not only acts as a reliable method for residual stress calculation but also serves as a directive to reduce tensile residual stress in a weldment which is sensitive to the selection of materials. In order to investigate the same for continuous and pulse laser-welded Ti–6Al–4V alloy, the sequentially coupled thermal–metallurgical–mechanical models are established. The internal state-dependent variables (SDVs) are implemented to capture the growth of phase evolved during diffusionless β → α′ transformation using Koistinen–Marburger (K–M) theory in the cooling cycle. The role played by a phase transformation induced strain on the generation of residual stress is systematically investigated. The volumetric dilation and associated phase fraction form the basis for the estimation of phase transformation strain in the present study. The accomplishment of highest martensitic fraction (∼95%) produced a phase transformation strain of 7.95 × 10−3 in pulse mode of operation. As a result, reversal of residual stress from tensile to compressive is perceived for pulse laser-welded specimen. Similarly, a sign of enriched martensitic transformation is noticed that puts the weld surface into a compression state and mitigates the overall tensile residual stress. The assumption of diffusional phase transformation during heating cycle and non-diffusional transformation during cooling phase in laser welding is more appropriate to predict the residual stress using thermal–metallurgical–mechanical model.
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
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
1秒前
kkk发布了新的文献求助10
3秒前
尊敬背包发布了新的文献求助10
4秒前
6秒前
8秒前
量子星尘发布了新的文献求助10
8秒前
kkk完成签到,获得积分10
10秒前
12秒前
小金星星完成签到 ,获得积分10
14秒前
zho应助科研通管家采纳,获得10
14秒前
华仔应助科研通管家采纳,获得10
14秒前
NexusExplorer应助科研通管家采纳,获得10
14秒前
量子星尘发布了新的文献求助10
17秒前
向往完成签到,获得积分10
17秒前
盛夏如花发布了新的文献求助30
18秒前
阳光问安完成签到 ,获得积分10
22秒前
28秒前
29秒前
34秒前
量子星尘发布了新的文献求助10
35秒前
40秒前
lf发布了新的文献求助10
45秒前
量子星尘发布了新的文献求助10
56秒前
1分钟前
铜锣湾新之助完成签到 ,获得积分10
1分钟前
量子星尘发布了新的文献求助10
1分钟前
1分钟前
1分钟前
风中的半雪完成签到,获得积分10
1分钟前
量子星尘发布了新的文献求助10
1分钟前
aichifan发布了新的文献求助10
1分钟前
尊敬背包完成签到,获得积分20
1分钟前
爆米花应助无辜的发卡采纳,获得10
1分钟前
Nayow完成签到,获得积分10
1分钟前
1分钟前
香蕉觅云应助aichifan采纳,获得10
1分钟前
量子星尘发布了新的文献求助10
1分钟前
1分钟前
andrele完成签到,获得积分10
1分钟前
1分钟前
高分求助中
Production Logging: Theoretical and Interpretive Elements 2700
Neuromuscular and Electrodiagnostic Medicine Board Review 1000
Statistical Methods for the Social Sciences, Global Edition, 6th edition 600
こんなに痛いのにどうして「なんでもない」と医者にいわれてしまうのでしょうか 510
Walter Gilbert: Selected Works 500
An Annotated Checklist of Dinosaur Species by Continent 500
岡本唐貴自伝的回想画集 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 物理 生物化学 纳米技术 计算机科学 化学工程 内科学 复合材料 物理化学 电极 遗传学 量子力学 基因 冶金 催化作用
热门帖子
关注 科研通微信公众号,转发送积分 3660936
求助须知:如何正确求助?哪些是违规求助? 3222150
关于积分的说明 9743605
捐赠科研通 2931648
什么是DOI,文献DOI怎么找? 1605146
邀请新用户注册赠送积分活动 757703
科研通“疑难数据库(出版商)”最低求助积分说明 734462