Mechanical Properties and Strain Hardening Behavior of Fe-8/11Mn-4Al-0.2C Steels

doi:10.12068/j.issn.1005-3026.2017.02.015

Abstract

Abstract: In order to optimize austenite volume fraction and stability， Fe-8Mn-4Al-0.2C (8Mn)and Fe-11Mn-4Al-0.2C (11Mn)steels were quenched at different temperatures. The variation of austenite fraction during tensile testing was measured by XRD. The results showed that 8Mn steel and 11Mn steel quenched at 750℃ obtain the best tensile property combinations， i.e.， the product of strength and elongation is up to 46.4GPa% and 66.9GPa%， respectively. 8Mn-750 sample and 11Mn-750 sample exhibit a similar three-stage strain hardening behavior. TRIP effect mainly occurs in stage 2 and 3. The 11Mn-750 sample， which has higher austenite fraction， transformation ratio and stability， has a much better ductility than 8Mn-750 sample.

Key words: medium Mn-content steel, mechanical property, TRIP effect, strain hardening behavior

CLC Number:

TG335.58

CAI Zhi-hui， LI Zhi-chao， CAI Bo， DING Hua. Mechanical Properties and Strain Hardening Behavior of Fe-8/11Mn-4Al-0.2C Steels[J]. Journal of Northeastern University Natural Science, 2017, 38(2): 224-228.

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