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flow instability at high strain rate. The 45° shear cracking, adiabatic shear band and the local plastic flow are the main deformation mechanisms. The globalization and kinking of the laminar α1 and α2... dissipation rate reaches the peak, which is about 53%. Key words: ZnAl10Cu2 alloy; processing map; microstructure; adiabatic shear band; globalization 高性能锌铝合金具有密度低,强度适中,硬度高和成本低等特点,作为铜合金的替代材料具有广阔的应用前景......
Microstructural softening induced adiabatic shear banding in Ti-23Nb-0.7Ta-2Zr-O gum metalSilu Liu1,Y.Z.Guo2,Z.L.Pan3,X.Z.Liao4,E.J.Lavernia5,Y.T.Zhu6,1,Q.M.Wei3,Yonghao Zhao11. Nano... candidate material for applications that require superior mechanical properties. In our earlier investigation of the GM [1], geometrical softening and the generation of adiabatic shear bands(ASBs......
special cracks whose "tips" are not sharp but arc and smooth, and without any evidence of deformation or adiabatic shear band were also observed on the impact end surfaces. Examination of the sections...: Ti-6Al-4V alloy; dynamic fracture behavior; adiabatic shear band; Taylor impact test 1 Introduction Ti-6Al-4V alloy is the most widely used titanium alloy[1], due to its attractive specific strength, low......
(Adiabatic shear band, ASB).从图4(a)~(c)可以看出,3个样品剪切带的宽度呈现一致的变化趋势,即沿着剪切方向从样品的顶端至底端,剪切带的宽度逐渐减小,可知剪切带内的变形程度不均匀且在应变较大的样品中更为剧烈.再者,随着应变的增大,试样底端的裂纹向剪切区域中部扩展也变得愈加狭长.XUE等[15]认为这是由于帽形试样本身的特点,在冲击载荷作用下,其两端会出现一段豁口.豁口会随着应变的增大... the adiabatic shear band (ASB) in TC17 titanium alloy with starting equiaxed microstructure studied by EBSD[J]. Materials Characterization, 2019, 151: 151-165. [7] 刘 筱, 杨 辉, 朱必武, 等. 高速冲击载荷下预变形AZ31镁合金的流变行为及本构模型[J......
of adiabatic shear band (ASB) are affected by both geometric and structural factors. The increase of dislocation density, structure fragment and temperature rise in the deformation-affected regions..., the sandwich structure in the middle of shear region is also possible to serve as favorable nucleation sites for crack initiation. Key words: Ti-6Al-2Zr-1Mo-1V alloy; adiabatic shear band; split Hopkinson......
Shear band formation in shaped rheocast aluminium component at various plunger velocities M. BLADH1, M. WESS?N2, A. K. DAHLE3 1. Swerea SWECAST AB, Box 2033, 550 02 J?nk?ping, Sweden; 2... globules present in the band 2. The band 2 consists of a narrow shear band containing a high volume fraction of eutectic. Small globular particles should result in a narrower band due to the smaller......
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in the target near the crater wall. Whirlpool-like adiabatic shear band is observed in the target (Figs. 5(d) and (e)). Micro-cracks in adiabatic shear band and micro-bands aside the adiabatic shear band can be seen in Fig. 5(f). Cracks are formed at the center part of the whirlpool-like adiabatic shear band (Fig. 5(g)). Local dynamic recrystallization grains can be observed at the edge of the crater......
; 梯度塑性理论; Johnson-Cook模型; Ti-6Al-4V; adiabatic shear band; width; average plastic shear strain; gradient-dependent plasticity; Johnson-Cook model; [全文内容正在添加中] ......
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