| Fe-8/11Mn-4Al-0.2C钢的力学性能及应变硬化行为 |
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| 引用本文： | 蔡志辉,李志超,才博,丁桦.Fe-8/11Mn-4Al-0.2C钢的力学性能及应变硬化行为[J].东北大学学报(自然科学版),2017,38(2):224-228. |
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| 作者姓名： | 蔡志辉 李志超 才博 丁桦 |
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| 作者单位： | (东北大学 材料科学与工程学院， 辽宁 沈阳110819) |
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| 基金项目： | 国家自然科学基金青年科学基金资助项目(51501035)； 中国博士后科学基金资助项目(2015M580230，2016T90227). |
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| 摘 要： | 对Fe-8Mn-4Al-0.2C(8Mn)和Fe-11Mn-4Al-0.2C(11Mn)实验钢进行不同温度的淬火热处理,实现奥氏体体积分数和稳定性的最优化.通过拉伸实验可得,8Mn钢和11Mn钢在淬火温度为750℃时,获得最佳的力学性能组合,即强塑积为46.4 GPa%和66.9 GPa%.8Mn-750试样和11Mn-750试样在拉伸过程中表现出相同的三阶段应变硬化行为.通过XRD测定变形过程中奥氏体体积分数的变化,研究发现TRIP效应主要发生在变形的第二和第三阶段.11Mn-750试样由于具有更高的奥氏体含量、转变量和稳定性,使得其塑性远远高于8Mn-750试样.
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| 关 键 词： | 中锰钢 力学性能 TRIP效应 应变硬化行为 |
Mechanical Properties and Strain Hardening Behavior of Fe-8/11Mn-4Al-0.2C Steels |
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| 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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| Authors: | CAI Zhi-hui LI Zhi-chao CAI Bo DING Hua |
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| Institution: | School of Materials Science & Engineering， Northeastern University， Shenyang 110819， China. |
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| 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. |
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| Keywords: | medium Mn-content steel mechanical property TRIP effect strain hardening behavior |
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