Impact of 475°C Long-Term Ageing on CUSTOM 465® Alloy's Microstructure
Effects of Long-Term Ageing at 475°C on the Microstructure, Mechanical Properties, and Performance of CUSTOM 465® Alloy
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This book explores the long-term ageing effects at 475°C on the microstructure and properties of Custom 465® alloy. It covers the theoretical aspects of precipitation-hardened stainless steels, including the formation of reverted austenite and its impact on mechanical properties, along with the 475°C embrittlement process in Fe-Cr steels. Experimental findings using TEM and XRD show that proper heat treatment leads to the precipitation of -Ni3Ti particles and a small amount of reverted austenite in tempered lath martensite. Extended ageing at 475°C for 1000 and 2000 hours results in furthe...
This book explores the long-term ageing effects at 475°C on the microstructure and properties of Custom 465® alloy. It covers the theoretical aspects of precipitation-hardened stainless steels, including the formation of reverted austenite and its impact on mechanical properties, along with the 475°C embrittlement process in Fe-Cr steels. Experimental findings using TEM and XRD show that proper heat treatment leads to the precipitation of -Ni3Ti particles and a small amount of reverted austenite in tempered lath martensite. Extended ageing at 475°C for 1000 and 2000 hours results in further precipitation and an increase in reverted austenite, which helps mitigate the hardening effect of the ´-Cr rich phase. The study demonstrates that while strength decreases with prolonged ageing, elongation and impact energy remain largely unaffected.
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