Effect of vibration and hot-wire gas tungsten arc (GTA) on the geometric shape

被引：47

作者：

Silwal, Bishal ^{[1
,2
]}

Santangelo, Michalel ^{[1
,2
]}

机构：

[1] Georgia Southern Univ, Mech Engn Dept, 201 Forest Dr, Statesboro, GA 30458 USA

[2] Georgia Southern Univ, Statesboro, GA 30460 USA

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2018年 / 251卷

关键词：

Welding; Additive manufacturing; GTAW; Hot-wire; Vibration; Droplet; HEAT-TRANSFER; WELDING WIRE; MOLTEN POOL; FLUID-FLOW; METAL; STEEL; LASER;

D O I：

10.1016/j.jmatprotec.2017.08.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bead-on-plate experiments were carried out, and the weld-bead size and shape were compared and discussed. The welding droplet parameters were measured by a high-speed camera. A computation fluid dynamics (CFD) model utilizing VOF (volume of fluid) method, incorporating the experimental droplet parameters has been developed to understand the weld pool dynamics and subsequent weld pool geometry. From the experimental results, a narrower and deeper penetration was observed with hot-wire while wider and shallow penetration was observed with cold wire gas tungsten arc welding (GTAW). The developed model has been applied to predict and analyze the mechanism for narrower and deeper penetration. A modified relationship has been established for droplet detachment in hot wire GTAW.

引用

页码：138 / 145

页数：8