WELD HEAT-AFFECTED ZONE IN TI-6AL-4V ALLOY .1. COMPUTER-SIMULATION OFTHE EFFECT OF WELD VARIABLES ON THE THERMAL CYCLES IN THE HAZ

Citation
Ak. Shah et al., WELD HEAT-AFFECTED ZONE IN TI-6AL-4V ALLOY .1. COMPUTER-SIMULATION OFTHE EFFECT OF WELD VARIABLES ON THE THERMAL CYCLES IN THE HAZ, Welding journal, 74(9), 1995, pp. 297-304
Citations number
36
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Metallurgy & Metallurigical Engineering
Journal title
ISSN journal
0043-2296
Volume
74
Issue
9
Year of publication
1995
Pages
297 - 304
Database
ISI
SICI code
0043-2296(1995)74:9<297:WHZITA>2.0.ZU;2-S
Abstract
The weld thermal cycles encountered in the HAZ of titanium alloys have been characterized using modified Rosenthal equations. The results ar e shown in the form of axonometric plots depicting the effect of two w eld variables keeping the other variables fixed. Computer simulation r esults show that the heat input and the plate thickness are the major variables affecting the thermal cycles in the HAZ. The effects of chan ges in welding speed are reflected in the variation in the heat input. The electrode radius has minimal effect and can be termed as the mino r variable. Preheat or interpass temperatures have an intermediate eff ect. An increase in electrode radius or decrease in plate thickness re quires large apparent displacement of the heat source above the plate surface to be incorporated in the analytical solutions. The melt pool width increases sharply with an increase in the heal input (q/v) or a decrease in plate thickness (d); however, preheat temperature (T-o) ha s negligible effect. The effect of weld variables on the effective hea r input is also similar. The t(8/5) parameter increases sharply with r educing plate thickness or increasing heat input.