Influence of milling on surface integrity of Ti6Al4V—study of the metallurgical characteristics: microstructure and microhardness
Influence of milling on surface integrity of Ti6Al4V—study of the metallurgical characteristics: microstructure and microhardness
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DOI：
10.1007/s00170-012-4582-5
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发表时间：
2013-07
期刊：
影响因子：
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通讯作者：
K. Moussaoui;M. Mousseigne;J. Senatore;R. Chieragatti;F. Monies
中科院分区：
文献类型：
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作者：
K. Moussaoui;M. Mousseigne;J. Senatore;R. Chieragatti;F. Monies
在航空领域，钛合金零件的质量要求很高，而可靠性在很大程度上与表面完整性有关。表面完整性一般由三个参数定义：几何参数、力学参数和冶金参数。本文研究了球磨对Ti6Al4V材料球磨表面冶金参数的影响，重点研究了球磨后的显微组织和显微硬度。从宏观角度观察加工表面，突出了橙色剥落现象。这种效果是研磨材料的再沉积和粉碎的综合结果。在球磨表面下没有观察到塑性变形层，也没有观察到晶粒的伸长。就显微硬度而言，在球磨表面下观察到了轻微软化区。此外，还发现钒从β相向α相扩散，但显微结构没有变化。
The quality of titanium alloy parts in the aeronautical field demands high reliability, which is largely related to surface integrity. Surface integrity is generally defined by three parameters: a geometric parameter, a mechanical parameter and a metallurgical parameter. The present article addresses the influence of milling on the metallurgical parameter for a surface milled in Ti6Al4V material, focusing in particular on the microstructure and microhardness. Observation of the machined surface from a macroscopic perspective highlight an orange peel phenomenon. This effect is the combined result of redeposition and crushing of the milled material. No plastically deformed layer or lengthening of the grains was observed under the milled surface. As far as microhardness is concerned, a slightly softened region was observed under the milled surface. A diffusion of vanadium from theβphase to theαphase was also noted, but with no change in microstructure.