Abstract
For the past three centuries, there has been a very high demand for stainless steel for different applications, due to its corrosion resistance coupled with the good strength and low cost of the metal. Several welding techniques have been adopted in the fabrication of stainless steel, with the choice of welding technique hinged on the desired requirements. Advancement has been made in its dissimilar welding with other metals like aluminum, copper and titanium. While similar welding of stainless steel faces the challenge of weld metal property deterioration, dissimilar welding poses more serious challenges due to the differential in chemical composition and the thermophysical properties of the base metals. A review of the literature reveals that considerable progress has been made in the improvement of the properties of the weld joint by the application of several weld treatment processes. It was discovered that most of the researchers focused on the effect of these weld treatment processes on the properties of the weld joints, with little attempt to establish a relationship between the microstructure and properties. This review paper critically analyzed the effect of weld treatment processes on the properties of stainless steel in light of microstructure-property correlation.
Highlights
The most sought-after material, which forms the backbone of most manufacturing industries, is still stainless steel, with its combination of strength and corrosion resistance giving it an edge over the cheap and readily available carbon steel, and its low price and availability making it the preferred choice over other resistant alloys such as those of titanium
The results revealed that there is a high positive correlation between delta ferrite composition and tensile strength, and the strength of correlation reduced when annealing was carried out at a lower temperature range, as can be seen in Tables 7 and 8
The properties of austenitic stainless steel are very sensitive to the presence of the delta ferrite phase
Summary
The most sought-after material, which forms the backbone of most manufacturing industries, is still stainless steel, with its combination of strength and corrosion resistance giving it an edge over the cheap and readily available carbon steel, and its low price and availability making it the preferred choice over other resistant alloys such as those of titanium. All statistical analyses were carried out using IBM® SPSS® Statistics version 26 As it may seem, despite the several studies available in literature addressing the effect of pre-and post-weld treatment on the microstructure and properties of stainless steel, only a few of them have established a connection or relation between themselves, despite their interdependence. The correlation between the delta ferrite composition and mechanical properties of austenitic stainless steel Establishing this relationship would give an insight of changes in properties of stainless steel, due to changes induced in the microstructure by a weld treatment processes, serving as a tool for forecasting. Authors analyzed the results of other researchers based on their findings on the effect of different pre-and post-weld treatments on welded stainless steel, and established a relationship between the microstructure and properties using correlation and regression
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