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Effect of Strain Rate on the Microstructure and Texture Evolution of the ZK60 Alloy Sheets
Metals and Materials International ( IF 3.5 ) Pub Date : 2020-10-03 , DOI: 10.1007/s12540-020-00879-3
Hongge Yan , Qin Wu , Jihua Chen , Weijun Xia , Min Song , Bin Su , Biao Huang

Abstract

The dynamic recrystallization (DRX), precipitation and texture evolution of the ZK60 alloy sheets rolled at 300 °C with different strain rates were studied, and the effects of texture on the plasticity were also clarified. The DRX grain sizes at five strain rates (5–25 s−1) are 1.4 μm, 1.2 μm, 1.8 μm, 2.4 μm and 2.8 μm, respectively, while the DRX volume fractions are 35.8%, 75.0%, 82.0%, 88.0% and 93.0%, respectively. The maximum intensity values of the (0002) texture are 7.91, 8.22, 7.64, 5.76 and 5.34 at five strain rates, respectively. The strongest (0002) texture is observed at the strain rate of 10 s−1, which is related to the relatively low DRX volume fraction and the precipitation density. The tensile strength (UTS) and yield strength (YS) increases firstly and then decreases, while the elongation (EL) gradually increases with increasing the strain rate, suggesting that the plasticity of the alloy sheet can be improved by decreasing the basal texture intensity and increasing the dispersion degree of the basal texture. The optimal comprehensive mechanical properties are obtained at the strain rate of 10 s−1, with UTS of 358 MPa, YS of 291 MPa and EL of 21.5%.

Graphic Abstract

The DRX grain sizes at five strain rates (5–25 s−1) are 1.4 μm, 1.2 μm, 1.8 μm, 2.4 μm and 2.8 μm, respectively, while the DRX volume fractions are 35.8%, 75.0%, 82.0%, 88.0% and 93.0%, respectively. The maximum intensity values of the (0002) texture are 7.91, 8.22, 7.64, 5.76 and 5.34, respectively. The tensile strength (UTS) and yield strength (YS) increases firstly and then decreases, while the elongation (EL) gradually increases with increasing the strain rate, and the optimal comprehensive mechanical properties are obtained at 10 s−1, with UTS of 358 MPa, YS of 291 MPa and EL of 21.5%



中文翻译:

应变速率对ZK60合金薄板组织和组织演变的影响

摘要

研究了在不同应变速率下于300°C轧制的ZK60合金板的动态再结晶(DRX),析出和织构演变,并阐明了织构对塑性的影响。在五个应变率(5-25 s -1)下的DRX晶粒尺寸分别为1.4μm,1.2μm,1.8μm,2.4μm和2.8μm,而DRX体积分数分别为35.8%,75.0%,82.0%,88.0 %和93.0%。在五个应变速率下,(0002)纹理的最大强度值分别为7.91、8.22、7.64、5.76和5.34。在10 s -1的应变速率下观察到最强(0002)的织,这与相对较低的DRX体积分数和降水密度有关。拉伸强度(UTS)和屈服强度(YS)先增大然后减小,而伸长率(EL)随着应变率的增加而逐渐增加,这表明合金板的塑性可以通过降低基础织构强度和增加基础纹理的分散度。最佳综合力学性能是在10 s -1的应变速率下获得的,UTS为358 MPa,YS为291 MPa,EL为21.5%。

图形摘要

在五个应变率(5-25 s -1)下的DRX晶粒尺寸分别为1.4μm,1.2μm,1.8μm,2.4μm和2.8μm,而DRX体积分数分别为35.8%,75.0%,82.0%,88.0 %和93.0%。(0002)纹理的最大强度值分别为7.91、8.22、7.64、5.76和5.34。拉伸强度(UTS)和屈服强度(YS)先增大然后减小,而伸长率(EL)随着应变率的增加而逐渐增加,并且在10 s -1时获得最佳的综合机械性能,UTS为358 MPa,YS为291 MPa,EL为21.5%

更新日期:2020-10-04
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