Effects of heat input on welding buckling distortion by experimental measurement method

Abstract

An experimental method based on digital image correlation technology is proposed to measure welding buckling distortion for bead-on-plane with tungsten inert gas welding. This study focuses on the effect of welding heat input for dynamic buckling and full-field distribution. The experimental results demonstrate that heat input has a great influence on welding buckling distortion. The longitudinal shrinkage of the weld bead is in direct proportion to the heat input. In the weld bead, the longitudinal plastic strain is small, while the transverse strain is large. The key points on the line, that is perpendicular to the bisector of the weld bead, experience a distorted trend of positive increase, constant displacement, negative increase and stable displacement, although the heat inputs are different.

The effect of pre-heating distance of shielded metal arc welding on the mechanical properties of AISI 1045 steel

“…It shows that the longer the pre-heating distance was given, the tensile strength of the weld product will increased. That result was in the same agreement with other [8][9] [10] which indicating that the The effect of pre-heating distance of shielded metal arc welding (smaw) on the mechanical properties of AISI 1045 steel pre-heating procedure may increase the tensile strength. In addition, some defect may decreased the tensile strength of the weld product [4] [11].…”

“…p ISSN 2721-5377 | e ISSN 2721-7825 DOI 10.37373/jttm.v3i2.312 109 size of the weld area and the HAZ and increase the tensile strength in the weld area [8]. Based on some of the descriptions above, this stydy is interested in researching SMAW welding on preheated AISI 1045 steel with a distance of 1.5 cm, 3 cm, and 4.5 cm [9].…”

Optimasi Pengelasan Disimilar Metal Ss 304 Dan Mild Steel Untuk Meminimalkan Efek Distorsi

“…Kuat arus mempengaruhi nilai distorsi, di mana distorsi terendah terjadi pada kuat arus 100 A, dan distorsi tertinggi terjadi pada kuat arus 80 A, hal ini sesuai dengan penelitiannya Amir Arifin [13]. Peningkatan arus sebanding dengan peningkatan panas yang terjadi yang berakibat meningkatnya tegangan sisa dan distorsi [14], sedangkan hasil penelitian menunjukkan bahwa tebal plat sangat mempengaruhi terjadinya distorsi, semakin tipis material terjadinya distorsi semakin tinggi seperti ditunjukkan dalam Gambar 1. Selain itu sudut pengelasan dengan distorsi rendah didapat dengan posisi sudut sebesar 80 0 dan 90 0 .…”

Framework for Mitigation of Welding Induced Distortion through Response Surface Method and Reinforcement Learning

“…These parameters are varied to find the final distorted shape of the specimen. Guo et al [21], in their experimental study on distortion measurement, related the longitudinal shrinkage in the base metal directly to heat input. The main factors of heat input are welding, current, speed, and voltage.…”