Mechanical Behavior of CrMo4 Steel with Dual-phase Microstructure
Multi-phase microstructures having good ductility may replace the conventional microstructures in different technological applications such as pressure vessels. Mechanical properties including the fracture behavior and the service life of pressure vessels are strongly affected by the microstructure. The objective of this study was to investigate the correlation between different dual-phase microstructures and mechanical properties of 42CrMo4 (AISI 4140) steel.To produce the martensite-bainite (M-B), the martensite-ferrite (M-F), and the ferrite-bainite (F-B) microstructures, the step quenching heat treatment was used. Mechanical properties of heat treated samples including the strength, ductility,and impact energy were measured. Tensile experiments revealed a discontinuous yielding in the F-B specimen with ferritic matrix.Fractographic results showed high concentration bright facets (BFs) on broken specimen surfaces indicating the brittle cleavage fracture was the predominant mechanism in the dual-phase microstructures.
42CrMo4 steel Dual-phase microstructures Cleavage fracture
A. Salemi1 A.-H.Golestaneh E. Moosavi-Khoonsari
Department of Metallurgy Engineering,Islamic Azad University-Karaj Branch, Karaj,Iran Noor Behineh Gostar Co.Ltd. Tehran,Iran
国际会议
The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)
北京
英文
309-315
2011-05-31（万方平台首次上网日期，不代表论文的发表时间）