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首页> 外文会议>World Conference on Titanium v.3; 20030713-20030718; Hamburg; DE >Reciprocating Sliding Wear Resistance of β21 SRx Titanium
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Reciprocating Sliding Wear Resistance of β21 SRx Titanium

机译：β21SRx钛合金的往复滑动耐磨性

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摘要

This investigation has examined the reciprocating-sliding wear behavior of solution-treated metastable β 21SRx and Ti-6Al-4V. Two apparent contact stresses, 1.5 and 5 MPa, were considered, the sub-surface response being monitored through measurements of the local plastic shear strain coupled with optical, scanning and transmission electron microscopy. The steady-state reciprocating-sliding wear rates increased with increasing contact stress, independent of alloy composition. At low apparent contact stress the wear rate of β21 SRx was superior to Ti-6Al-4V, this ranking being reversed at the higher apparent contact stress. Additionally the maximum plastic shear strain, the extent of the plastic, plastic shear and tribo-layers all increased with apparent contact stress, the extent of the plastic and plastic shear zones being greater for β 21 SRx vis a vis Ti-6Al-4V. Optical and transmission electron microscopy showed that deformation in β 21 SRx was characterized, at low apparent contact stress, by twinning and planar slip, these becoming more intense and refined as the wear surface was approached. In contrast deformation at high apparent contact stress involved formation of slip bands, with refinement, microcrack initiation at the intersection of these bands and microcrack propagation along the slip bands being noted as the wear surface was approached.
机译：该研究检查了固溶处理的亚稳态β21SRx和Ti-6Al-4V的往复滑动磨损行为。考虑了两个表观接触应力，分别为1.5和5 MPa，通过与光学，扫描和透射电子显微镜相结合的局部塑性剪切应变的测量来监测次表面响应。稳态往复滑动磨损率随接触应力的增加而增加，与合金成分无关。在较低的表观接触应力下，β21SRx的磨损率优于Ti-6Al-4V，在较高的表观接触应力下该排名相反。另外，最大塑性剪切应变，塑性，塑性剪切和摩擦层的范围均​​随着表观接触应力而增加，相对于Ti-6Al-4V，β21 SRx的塑性和塑性剪切区的范围更大。光学和透射电子显微镜显示，β21 SRx的变形特征是，在低表观接触应力下，通过孪晶和平面滑移，随着接近磨损表面，它们变得更加强烈和细化。相反，在高表观接触应力下的变形涉及滑移带的形成，通过细化，在接近磨损表面时注意到在这些带的相交处的微裂纹萌生和沿滑移带的微裂纹传播。

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