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多晶Cu屈服及后继屈服拉扭实验的晶体塑性数值分析胡桂娟1,2,张克实1,石艳柯2,苏莉3(1.广西壮族自治区南宁市广西大学工程防灾与结构安全重点实验室2.广西壮族自治区南宁市 广西建设职业技术学院3.航天科工集团二院二一零所)摘 要:针对预拉伸和预扭转变形后的拉扭组合实验,用多晶集合体模型为代表性单元,结合晶体塑性理论对多晶Cu进行了晶粒尺度的屈服特性研究,采用子模型法对晶粒尺度的代表性单元模型和多晶Cu试样拉扭实验进行跨尺度材料力学行为分析.结合对多晶集合体的后继屈服面形状及演化趋势的研究,探讨不同加载路径和......
, grain size, as well as high temperature mechanical, heat processing plasticity and the variations regularity were investigated. The result shows that the microstructures of Ti600 alloy are refined to some degree. The thermal plasticity of Ti600 alloy is improved obviously with hydrogen increasing from 0.1% to 0.5%. Key words: Ti600 alloy; thermo-hydrogenation treatment; microstructure refinement......
Effects of strain state and slip mode on the texture evolution of a near-α TA15 titanium alloy during hot deformation based on crystal plasticity methodJie Zhao1,2,Liangxing Lv3,Kehuan Wang1,2,Gang... forming. In this paper, the texture evolution of a near-α TA15 titanium alloy during the hot metal forming under different strain states were discussed based on the crystal plasticity finite element......
was compared with experimental result. Gradient-dependent plasticity(GDP) was introduced into J-C model and GDP was involved in the measured flow shear stress-shear strain curve, respectively... strain; gradient- dependent plasticity  ......
Multi-scale crystal plasticity ?nite element simulations of the microstructural evolution and formation mechanism of adiabatic shear bands in dual-phase Ti20C alloy under complex dynamic loadingYu...-scale crystal plasticity finite element method with experimental measurements. The complex local micro region load was progressively extracted from the simulation results of a macro model and applied......
固溶温度对双相不锈钢00Cr25Ni7Mo3N组织及力学性能的影响李树健1,2,宋志刚2,郑文杰2,陶东平-1(1.云南省昆明市昆明理工大学冶金与能源工程学院2.北京市钢铁研究总院结构材料研究所)摘 要:通过00Cr25Ni7Mo3N室温冲击和拉伸试验,并利用金相图像分析,研究不同固溶温度下00Cr25Ni7Mo3N双相不锈钢的组织及力学性能的变化.在试验条件下9,00~980℃固溶温度范围内,在奥氏体与铁素体相界析出大量σ相,导致钢的塑性与韧性显著下降;固溶温度高于1 000℃后,随着固溶温度的升高,σ相渐渐......
质量,可尽量排除单元性质对计算结果的影响. 图2 轧制极薄带晶体塑性有限元模型 Fig. 2 Crystal plasticity finite element model of foil rolling 晶体塑性有限元模拟箔轧工艺参数:上下工作轧辊直径为30 mm,上工作辊转速为1.04 rad/s,上下工作辊异速比为1.1,轧辊与轧件之间接触采用库仑摩擦定律,摩擦因数..., PARTHASARATHY T A. A crystal-plasticity FEM study on effects of simplified grain representation and mesh types on mesoscopic plasticity heterogeneities[J]. Materials Science and Engineering A, 2012, 553......
Trans. Nonferrous Met. Soc. China 22(2012) 348-353 Enhanced plasticity of Fe-based bulk metallic glass by tailoring microstructure GUO Sheng-feng1, WANG Jing-feng2, ZHANG Hong-ju2, XIE Sheng-hui3,4... 2011; accepted 5 September 2011 Abstract: The room temperature compressive plasticity of Fe75Mo5P10C8.3B1.7 bulk metallic glass (BMG) was improved from 0.5% to 1.8% by increasing the sample diameter......
fraction of the PST grains. The characteristic length of plasticity of the micropolar matrix is approximately as the same order of magnitude as the average diameter of the matrix particles. Key words: γ-TiAl-based alloys; plasticity; micropolar theory; size effect; micromechanics γ-TiAl基合金被认为是非常有前途的新型轻量化高温结构材料, 在航空, 航天, 汽车等领域具有广阔的应用前景. 由于其可控的多种微结构组织 形式和良好的高温结构强度, 近年来, 两相(γ-TiAl......