AerMet100超高强度钢的动态力学性能研究
发布时间：2018-11-17 21:22
【摘要】：对AerMet100超高强度钢淬火后深冷处理,然后在不同温度下回火,利用OM,SEM,TEM对处理后的组织进行观察。采用分离式Hopkinson压杆研究不同热处理工艺对其动态力学性能的影响规律。结果表明:深冷处理可降低残余奥氏体的含量,提高材料的动态塑性,改善材料的综合性能;在高应变率(1000~4200s~(-1))下,与准静态相比,材料表现出明显的应变率硬化效应。随着回火温度的升高,材料的动态压缩强度呈现出先升高后降低的趋势,在482℃时出现峰值,约为2800MPa。在动态加载条件下,材料的断裂形式均是剪切断裂。
[Abstract]:The microstructure of AerMet100 ultrahigh strength steel was observed by OM,SEM,TEM after quenching and then tempering at different temperatures. The effect of different heat treatment processes on the dynamic mechanical properties of split Hopkinson compression bar was studied. The results show that cryogenic treatment can reduce the content of retained austenite, improve the dynamic plasticity of the material and improve the comprehensive properties of the material. At high strain rate (1000 ~ (-1) / 4200s ~ (-1), the strain rate hardening effect of the material is obvious compared with that of quasi static state. With the increase of tempering temperature, the dynamic compressive strength of the material increased first and then decreased, and reached a peak value of about 2800MPa at 482 鈩，
本文编号：2339072
[Abstract]:The microstructure of AerMet100 ultrahigh strength steel was observed by OM,SEM,TEM after quenching and then tempering at different temperatures. The effect of different heat treatment processes on the dynamic mechanical properties of split Hopkinson compression bar was studied. The results show that cryogenic treatment can reduce the content of retained austenite, improve the dynamic plasticity of the material and improve the comprehensive properties of the material. At high strain rate (1000 ~ (-1) / 4200s ~ (-1), the strain rate hardening effect of the material is obvious compared with that of quasi static state. With the increase of tempering temperature, the dynamic compressive strength of the material increased first and then decreased, and reached a peak value of about 2800MPa at 482 鈩，
本文编号：2339072
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