Abstract
This research intends to find out the optimal mechanical properties of AISI 4130 steel welded by the GTAW process. Six test plates were joined by two types of filler wire with similar chemical composition to the base metal, and with lower carbon content and slightly higher alloy elements content compared to the first one. Test plates then exerted three different pre-heat and post-heat treatments on both groups. The three types of heat treatments were alternatively without pre-heat and post-heat, with pre-heat only, and finally with pre-heat and post-heat. Tensile, side bends and impact tests (for weld zone and HAZ) have been conducted. Results show that using low-carbon filler wire along with pre- and post-heat resulted in outstanding mechanical properties.
Highlights
The unending search for novel mechanical properties has led to significant development in material with high strength
A considerable portion of the literature has focused on technical aspects or advanced technology devices such as laser or electron beam welding to Effects of Fillerwire Composition Along with Different Pre- and Post-Heat Treatment onMechanical Properties of AISI 4130 Welded by the GTAW Process study fatigue, crack growth or residual stress on 4130 [9]
A can be L or B B can be 1, 2 or 3 D is sample number C can W or H onMechanical Properties of AISI 4130 Welded by the GTAW Process
Summary
The unending search for novel mechanical properties has led to significant development in material with high strength. The 4130 grade of chrom-moly is in the HSLA group of steel. 4130 is not lighter than general steels, its higher specific strength ratio enables the engineers to reduce the weight of designs by using thinner thicknesses. Having ductility and specific strength at the same time increases the applications of 4130 in the aerospace, machinery, and motor sports industries. The sensitivity of high-strength and ultra-high-strength steel to the welding, increases the need to investigate the weld ability and mechanical properties of these types of steel. The cooling rate of steel affects its microstructure and constructs different phases. Different microstructures result in different mechanical properties
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