Das , Debdulal and Chattopadhyay, P P (2002) A Study on the effect of Martensite Morphology on Mechanical Properties of High-Martensite Dual- Phase Steels. In: Proceedings of Seminar on Resurgence of Metallic Materials the Current Scenario (ROMM-2002), 24-25, October 2002, National Metallurgical Laboratory (CSIR), Jamshedpur.
The effect of martensite morphology on the mechanical properties of high-martensite dual phase microstructure obtained by intermediate quenching(IQ)and stepquenching (SQ) of a low carbon microalloyed steel is dealt with. The IQ-treatment results in formation of fine and fibrous martensite morphology uniformly distributed in the ferrite matrix. In contrast, SQ-treatment yields blocky and banded martensite and ferrite morphology. Suitable variation of intercritical annealing temp-eratures adopted for both the treatments allowed the evolution of different volume fraction of martensite within a range between 0.26 to 0.71. A carefully condu-cted comparison of tensile results and fracture surfaces of the representative samples obtained after IQ- and SQtreatments indicates that the morphology of martensite formed by the IQ-treatment offer better formability and toughness in the present dualphase steels with an increased volume fraction of martensite (>0.25).
|Item Type:||Conference or Workshop Item (Paper)|
|Uncontrolled Keywords:||Intermediate quenching; stepquenching; martensite morphology|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||Sahu A K|
|Deposited On:||04 Nov 2011 13:51|
|Last Modified:||02 Dec 2011 12:02|
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