Effect of heat accumulation on the microstructure of Invar alloy manufactured by multi-layer multi-pass laser melting deposition

材料科学 微观结构 沉积(地质) 图层(电子) 合金 激光器 复合材料 因瓦 冶金 光学 沉积物 生物 物理 古生物学
作者
Ting Liu,Zhuanni Gao,Wanli Ling,Yanni Wang,Xiaoming Wang,Xiaohong Zhan
出处
期刊:Optics and Laser Technology [Elsevier BV]
卷期号:144: 107407-107407 被引量:24
标识
DOI:10.1016/j.optlastec.2021.107407
摘要

• A three-dimensional finite element model was established to calculate the temperature field. • Multi-layer multi-pass deposited samples of Invar alloy were fabricated by laser melting deposition. • The microstructure characteristics differ at different region of the deposited samples. • The grain size shows a dimension discrepancy at different region near the fusion line. Invar alloy has an important application in the manufacture of composite forming mould. The laser melting deposition (LMD) technology was utilized to fabricate multi-layer multi-pass deposited samples in this study. The effect of heat accumulation on the microstructure of deposition layer (DL) was investigated through experimental and simulation method. A finite element (FE) model was established to study the temperature field distribution in LMD process. Microstructure of DL was investigated by optical microscope (OM), scanning electron microscope (SEM), and energy dispersive spectrometer (EDS). The thermal cycle curves were extracted for analysis. The accumulation of heat during the deposition process would make the higher location DL reach a higher peak temperature. It could be seen from the observation of the transverse section of the deposited samples that the microstructure consisted of elongated cellular crystals and regular cellular crystals. At the bottom of the DL were columnar crystals grown epitaxially along the maximum temperature gradient and gradually transitioned to equiaxed crystals at the top of the DL. EDS detection results showed that there was no element aggregation phenomenon in the DL. The grains in the remelted zone were coarsened due to suffering a state of overheating.
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
yoyo发布了新的文献求助10
刚刚
zhui发布了新的文献求助10
1秒前
旦丁洋发布了新的文献求助10
2秒前
上官若男应助科研通管家采纳,获得10
2秒前
MchemG应助科研通管家采纳,获得10
3秒前
3秒前
3秒前
搜集达人应助科研通管家采纳,获得30
3秒前
3秒前
3秒前
3秒前
3秒前
huzhu123发布了新的文献求助30
4秒前
4秒前
4秒前
5秒前
星辰大海应助TT采纳,获得10
5秒前
5秒前
Tingshan发布了新的文献求助10
5秒前
甜美剑愁发布了新的文献求助10
5秒前
小妍完成签到,获得积分10
6秒前
钟小凯完成签到 ,获得积分10
6秒前
6秒前
筋筋子完成签到,获得积分10
7秒前
Hello应助kidult采纳,获得10
7秒前
7秒前
7秒前
Lone完成签到,获得积分10
8秒前
dd完成签到,获得积分10
8秒前
Zora完成签到,获得积分10
8秒前
GUESSSS发布了新的文献求助10
8秒前
大力的天奇完成签到,获得积分10
8秒前
陈娟发布了新的文献求助10
9秒前
北还北发布了新的文献求助10
9秒前
enen发布了新的文献求助10
9秒前
香蕉笑阳发布了新的文献求助10
9秒前
六点一横发布了新的文献求助10
9秒前
qiaojiajia发布了新的文献求助10
10秒前
PWG发布了新的文献求助30
10秒前
陈乐宁2024发布了新的文献求助10
10秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
Effective Learning and Mental Wellbeing 300
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 3974426
求助须知:如何正确求助?哪些是违规求助? 3518788
关于积分的说明 11195842
捐赠科研通 3254946
什么是DOI,文献DOI怎么找? 1797649
邀请新用户注册赠送积分活动 877037
科研通“疑难数据库(出版商)”最低求助积分说明 806130