Abstract
In this study, the artificial ageing behaviour of interstitial-free steels is investigated under as-received, heat-treated, and spot-welded conditions. All the test specimens except those in the as-received condition were austenitized at 950°C for 15min followed by water cooling. Both as-received test pieces and heat-treated test pieces were prestrained by 8 per cent in tension, and then aged at 170°C for 10min, 20min, 40min, 60min, 80min, and 120min. The experimental work revealed that strain ageing takes place in as-received, heat-treated, and spot-welded test pieces. However, strain ageing is more pronounced in heat-treated test pieces and spot-welded heat-treated test pieces, compared with the as-received test pieces and spot-welded as-received test pieces. This is due to the nature of heat treatment and spot welding.
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Schedule a callMore From: Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
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