Abstract
A welding of dissimilar alloy gives an optimum combination of high strength of Ti-10V-2Fe3Al (Ti1023) and low cost of Ti-6Al-4V (Ti64). Three different fusion ratios of Ti1023 and Ti64 were resulting in a similar width size of the fusion zone (FZ) and heat affected zones (HAZ) whereas a thicker sample with the same fusion ratio generated a narrower size of FZ and HAZ. It resulted chemical composition in the FZ within a low β phase stability than in Ti1023, which allowed the precipitation of high hardness α” martensitic in the as weld condition. In the HAZ of Ti1023, αs transformed into β phase, which reduced the hardness and strength. Vickers hardness measurements confirmed the HAZ of Ti1023 was the softest area whereas the FZ was the hardest area. Consequently, in the as weld condition, the fracture occurred in the HAZ of TI1023 after the tensile test.
Highlights
The excellent mechanical ability, lightweight, and numerous corrosion resistance of titanium alloy develop a wide range application in industries [1]
Based on the different of beta (β) phase stability in room temperature, titanium alloys are categorized into alpha (α), alpha-beta (α + β), and beta (β) titanium
X-ray diffraction (XRD) observation of the zones conducted at 40 kV and 30mA
Summary
The excellent mechanical ability, lightweight, and numerous corrosion resistance of titanium alloy develop a wide range application in industries [1]. Based on the different of beta (β) phase stability in room temperature, titanium alloys are categorized into alpha (α), alpha-beta (α + β), and beta (β) titanium. A common β titanium alloy, Ti1023, develops a higher strength than α + β titanium alloys, which obtains 1200 MPa of Ultimate Tensile Strength (UTS) subsequent to the heat treatment [2]. The β stability of β titanium alloys remain steady to take place single β phase at ambient temperature, unlike α + β titanium. Titanium alloys has good weld ability through wide variety welding processes. Titanium alloys are easy to react in high temperature with oxygen and nitrogen that resulting from a decrement in the mechanical properties [11,12]
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