超高强度钢30crmnsini2a在高应变速率和高温下的动态力学行为

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Qiu-lin Niu , Wei-wei Ming , Ming Chen , Si-wen Tang , Peng-nan Li
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引用次数: 22

摘要

在制造领域的高速加工中,切屑形成是一个大应变、高应变率和高温的剧烈塑性变形过程。高速切削过程中应变速率可达105 s−1。30crmnsini2a钢是一种重要的高强度低合金结构钢,具有广泛的应用范围。获得30crmnsini2a在高应变速率和高温条件下的动态力学性能是建立高速加工本构关系模型的必要条件。采用分离式霍普金森压杆(SHPB)试验研究了30crmnsini2a钢在30 ~ 700℃、3000 ~ 10000 s−1条件下的动态压缩力学性能。研究了30crmnsini2a钢在不同温度和应变速率下的应力应变曲线,并讨论了应变硬化效应和温度效应。实验结果表明,30crmnsini2a在300℃时具有明显的温度敏感性。随着温度的升高,流动应力显著减小。随着应变的增大,材料在高应变速率下的应变硬化效应不明显。随着温度的升高,应变速率硬化效应明显。实验结果表明,所建立的30crmnsini2a钢的Johnson-Cook (J-C)本构模型可以在高应变速率和高温下使用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamic mechanical behavior of ultra-high strength steel 30CrMnSiNi2 A at high strain rates and elevated temperatures

During high speed machining in the field of manufacture, chip formation is a severe plastic deformation process including large strain, high strain rate and high temperature. And the strain rate in high speed cutting process can be achieved to 105 s−1. 30CrMnSiNi2 A steel is a kind of important high-strength low-alloy structural steel with wide application range. Obtaining the dynamic mechanical properties of 30CrMnSiNi2 A under the conditions of high strain rate and high temperature is necessary to construct the constitutive relation model for high speed machining. The dynamic compressive mechanical properties of 30CrMnSiNi2 A steel were studied using split Hopkinson pressure bar (SHPB) tests at 30 – 700 °C and 3000 – 10000 s−1. The stress-strain curves of 30CrMnSiNi2 A steel at different temperatures and strain rates were investigated, and the strain hardening effect and temperature effect were discussed. Experimental results show that 30CrMnSiNi2 A has obvious temperature sensitivity at 300 °C. Moreover, the flow stress decreased significantly with the increase of temperature. The strain hardening effect of the material at high strain rate is not significant with the increase of strain. The strain rate hardening effect is obvious with increasing the temperature. According to the experimental results, the established Johnson-Cook (J-C) constitutive model of 30CrMnSiNi2 A steel could be used at high strain rate and high temperature.

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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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