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地填写文献信息,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!

Microstructure and Mechanical Properties of GTAW Welded Joint of Invar Alloy

材料科学 焊接 钨极气体保护焊 因瓦 冶金 极限抗拉强度 复合材料 微观结构 热影响区 合金 粒度 电弧焊
作者
DongSheng Zhao,TianFei Zhang,Liangliang Wu,LeLe Kong,Yujun Liu
出处
期刊:Journal of ship production and design [The Society of Naval Architects and Marine Engineers]
卷期号:37 (03): 143-150 被引量:2
标识
DOI:10.5957/jspd.12190062
摘要

Experiment of automatic gas tungsten arc welding of liquefied natural gas carrier Invar alloy with a thickness of .7 mm was completed, and the welding parameters were optimized, as well as microstructure and mechanical properties of the welded joint were measured and analyzed. The grain size of the area near the weld centerline was small, mainly cellular dendrites, and the grain size on both sides of the weld centerline increased gradually, mainly dendrites, whereas the grain size near fusion line was larger, and there were more columnar crystals. The heat-affected zone was composed of coarse austenite grains. Transgranular cracks were the main cracks in the welding seam. When welding current was 40 A, frequency was 120 Hz, and welding speed was 350 mm/min, tensile strength of the welded joint was 446.9 MPa, which 88.1% of the base metal’s tensile strength and 10.3% of the fracture elongation. The fracture surface of tensile specimens showed typical plastic fracture characteristics, with no obvious crack characteristics, and no eutectic liquid films were observed. Introduction Invar alloy is a Fe–36%Ni alloy. Its thermal expansion coefficient at room temperature is less than 1.6X10-6/k, which is about one-tenth of that of low carbon steel, and changes little in a larger temperature range. Therefore, Invar alloy is widely used in making precision measuring instruments and low temperature-resistant materials (Corbacho et al. 1998; Park et al. 2011; Qiu et al. 2016; Yakout et al. 2018). In recent years, with the increasing demand for clean energy, liquefied natural gas (LNG) carriers are developing rapidly (Zhao et al. 2015; Oh et al. 2018). LNG liquefies at temperatures below -161.5°C. The volume of LNG is about 1/ 625 of the volume of gaseous natural gas of the same mass; thus, it can transport large quantities of natural gas over long distances.
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
哈哈发布了新的文献求助10
1秒前
FrozNineTivus完成签到,获得积分10
1秒前
兜兜完成签到 ,获得积分10
3秒前
哈哈完成签到,获得积分10
27秒前
夏瑞完成签到,获得积分10
30秒前
wangyang完成签到 ,获得积分10
30秒前
闪闪蜜粉完成签到 ,获得积分10
37秒前
42秒前
47秒前
lailai完成签到 ,获得积分10
54秒前
cgg完成签到 ,获得积分10
58秒前
迷你的靖雁完成签到,获得积分10
1分钟前
1分钟前
1分钟前
小L完成签到 ,获得积分10
1分钟前
核桃发布了新的文献求助10
1分钟前
斜阳完成签到 ,获得积分10
1分钟前
xiloyou完成签到 ,获得积分10
1分钟前
大个应助科研通管家采纳,获得10
1分钟前
luna完成签到,获得积分10
1分钟前
1分钟前
1分钟前
1分钟前
2分钟前
lsm发布了新的文献求助10
2分钟前
2分钟前
2分钟前
和谐诗双完成签到 ,获得积分10
2分钟前
obsidian发布了新的文献求助10
2分钟前
2分钟前
2分钟前
我要读博士完成签到 ,获得积分10
2分钟前
卡卡东完成签到 ,获得积分10
2分钟前
蛙蛙完成签到,获得积分10
2分钟前
威武的元冬完成签到,获得积分20
2分钟前
勇敢牛牛完成签到 ,获得积分10
2分钟前
泉水丁冬2023完成签到 ,获得积分10
2分钟前
glanceofwind完成签到 ,获得积分10
2分钟前
Owen应助lsm采纳,获得10
2分钟前
学者风范完成签到 ,获得积分10
2分钟前
高分求助中
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
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 3990012
求助须知:如何正确求助?哪些是违规求助? 3532077
关于积分的说明 11256227
捐赠科研通 3270933
什么是DOI,文献DOI怎么找? 1805139
邀请新用户注册赠送积分活动 882270
科研通“疑难数据库(出版商)”最低求助积分说明 809228