检索结果-南通市图书馆

Effect of welding current on morphology and microstructure of Al alloy T-joint in double-pulsed mig welding

Transactions of Nonferrous Metals Society of China 2015年第10期25卷 3204-3211页

作者：易杰曹淑芬李落星郭鹏程刘开勇湖南大学汽车车身先进设计制造国家重点实验室长沙410082

The effect of current on the morphology of Al alloy T-joint in double-pulsed metal inert gas（DP-mig） welding process was investigated by simulation and experiment.A three-dimensional finite element model and the DP-mig heat source of double-ellipsoidal volumetric model were developed to simulate the temperature and stress fields under different welding *** macro-morphology and microstructure of welding joints at the corresponding currents were observed in the *** results show that the best condition is at an average current of 90 A and current difference of 40 A,when the maximum temperature is 200 °C higher than the fusion points,with the temperature difference of about 100 °C and stress change of 10 MPa between thermal pulse and thermal *** these conditions,Al alloy T-joint with proper fusion condition has smooth fish-scale welding appearance and finer ***,the thermal curves and stress distribution in the experiment are consistent with those in the simulation,verifying the precision of the welding simulation.

关键词： double-pulsed mig welding Al alloy T-joint welding current stress

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of post-weld heat treatment on microstructure and mechanical properties of welded joints of 6061-T6 aluminum alloy

引用

Transactions of Nonferrous Metals Society of China 2019年第10期29卷 2035-2046页

作者： Jie YI Guan WANG Shi-kang LI Zhi-wen LIU Yan-li GONG College of Mechanical Engineering Hunan Industry PolytechnicChangsha 410208China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China Qiuzhen College Huzhou UniversityHuzhou 313000China College of Mechanical Engineering University of South ChinaHengyang 421001China

6061 aluminum alloy T-joints were welded by double-pulsed mig welding process. Then, the post-weld heat treatment was performed on the welded T-joints. The weld microstructure under different aging temperature and time was investigated by transmission electron microscopy and scanning electron microscopy. The mechanical properties were examined by hardness test and tensile test. The results showed that the micro-hardness was sensitive to heat treatment temperature and time. Increasing temperature was beneficial to the shortening of peak aging time. There were a large number of dislocations and few precipitates in the welded joints. With the increase of post-weld heat treatment temperature and time, the density of dislocation decreased. Meanwhile, the strengthening phase precipitated and grew up gradually. When the post-weld heat treatment temperature increased up to 200℃, large Q' phases were observed. And they were responsible for the peak value of the micro-hardness in the welded joints.

关键词： 6061 aluminum alloy double-pulsed mig welding post-weld heat treatment microstructure evolution mechanical property

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：