【摘 要】
：
用分离式霍普金森压杆对TA2工业纯钛进行了动态压缩及绝热剪切破坏实验研究,得到了不同应变率和不同温度下的宏观应力-应变曲线。通过对压缩本构特性及微观金相破坏的比较分
论文部分内容阅读
用分离式霍普金森压杆对TA2工业纯钛进行了动态压缩及绝热剪切破坏实验研究,得到了不同应变率和不同温度下的宏观应力-应变曲线。通过对压缩本构特性及微观金相破坏的比较分析,讨论了应变率、表观压缩本构特性对绝热剪切形成的影响。结果显示:TA2试样动态压缩呈现绝热剪切破坏特征,绝热剪切带在空间呈对称的双锥形状;应变率越高,形成绝热剪切带的临界应变越小;分析表明,动态压缩实验无法得到关于绝热剪切起始、发展过程的本构软化信息。
The dynamic compression and adiabatic shear failure of TA2 industrial pure titanium were investigated with split Hopkinson pressure bar, and the macroscopic stress-strain curves at different strain rates and different temperatures were obtained. By comparing the compressive constitutive properties and the microstructure failure, the effects of strain rate and apparent compression constitutive properties on adiabatic shear formation are discussed. The results show that the dynamic compression of TA2 sample shows the characteristics of adiabatic shear failure and the adiabatic shear band has a symmetrical biconical shape in space. The higher the strain rate, the smaller the critical strain of adiabatic shear band. The analysis shows that the dynamic compression experiment Unable to get on the start of adiabatic shear, the process of constitutive softening information.
其他文献
利用短视频社交媒体传播城市品牌对于促进该城市旅游产业发展至关重要.西安市在利用短视频进行城市品牌营销方面取得了一定成绩,如2017年的永兴坊“摔碗酒”“毛笔酥”走红等
We discuss spin reorientation phenomena, which may or may not yield gap formation, on the surface of topological crystalline insulators Pb$_{mathrm{1-x}}$Sn
Solid oxide fuel cells (SOFCs) are expected to be a crucial technology in the future power generation[1, 2].SOFCs offer many desirable advantages compared t
我们发展了缺陷诱导的具有准局域自旋磁矩的内禀磁杂质理论。由于内禀磁杂质的波函数由零模来表示，与其它的巡游电子正交，所以它的性质完全不同于具有自旋磁矩的安德森杂质
对B2相区等温锻造后的Ti-22Al-25Nb合金在热处理中的显微组织特征参数进行定量分析。用图像分析软件Image-Pro Plus测量了各个相的体积分数、初生粗板条O相以及次生细板条O相
研究了在钛合金表面渗氮-离子镀TiAlN膜复合处理与单一离子镀TiAlN膜处理工艺对钛合金力学性能、海水环境下的摩擦学的影响。采用SEM S4800、XRD、XPS、纳米压痕仪,观察了薄
西安“坊上”是一个具有历史文化特色的少数民族街区.西安市政府紧贴实际,正确贯彻民族政策,使“坊上”在建设和谐社会和全面小康社会中发挥了积极作用.具体做法是:(一)尊重
Two new phases of water, the mid-density hexagonal monolayer ice and the high-density flat rhombic monolayer ice, are observed in our molecular dynamics sim
The experimental observation that H2O molecules could be dissociated with a unity sticking coefficient on Si(100)-2x1 surface in low temperatures (especiall
Though topological insulators (TIs) are started from 2D case, the experimentally confirme number of 2D TIs is much smaller than that of 3D TIs.2D TIs can suppor