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首页> 外文期刊>Materials transactions >Characterizations of Temperature-Dependent Tensile Deformation and Fracture Features of Commercially Pure Titanium
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Characterizations of Temperature-Dependent Tensile Deformation and Fracture Features of Commercially Pure Titanium

机译：商业纯钛的温度依赖性拉伸变形和断裂特征

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摘要

Tensile deformation and fracture behavior of a commercially pure (CP) titanium were investigated at different temperatures through mechanical tests, microstructural observations and fractal analyses. It was found that, with increasing temperature, the number and size of microvoids formed along shear bands (SBs) or at the intersections of SBs on the deformed specimen surface increase, and the fractal dimensions of the scanning profile at the surface near fracture increase correspondingly, and the ones measured perpendicular to the tensile direction is obviously larger than those parallel to the tensile direction, indicating an increased concentration of plastic deformation of CP Ti along the tensile axis. The diameter and depth of dimples on the fracture surfaces of CP Ti increase significantly with increasing temperature, giving rise to a higher fracture surface roughness reflected by a higher fractal dimension. TEM observations demonstrated that the plastic deformation of CP Ti is gradually occupied by dislocation slipping rather than twinning with increasing temperature. This is in good agreement with the fractal analyses of the deformation and fracture features.
机译：通过机械测试，微观结构观察和分形分析，研究了商业纯（CP）钛在不同温度下的拉伸变形和断裂行为。研究发现，随着温度的升高，在变形试样表面上沿着剪切带（SBs）或在SBs的交点处形成的微孔的数量和尺寸增加，并且在断裂附近表面的扫描轮廓的分形维数也相应增加。 ，垂直于拉伸方向测得的值明显大于平行于拉伸方向测得的值，表明CP Ti沿拉伸轴的塑性变形浓度增加。 CP Ti断裂面上的凹坑直径和深度随温度升高而显着增加，这由较高的分形维数反映出较高的断裂表面粗糙度。 TEM观察表明，CP Ti的塑性变形逐渐由位错滑移占据，而不是随温度升高而孪生。这与变形和断裂特征的分形分析非常吻合。

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