Comparative study on tribology and microhardness of laser synthesized Ti-Al2O3/Zn coatings on Ti-6Al-4V alloy

IF 1.6 Q4 MATERIALS SCIENCE, COATINGS & FILMS

Tribology - Materials, Surfaces & Interfaces Pub Date : 2020-02-04 DOI:10.1080/17515831.2020.1720380

A. Mthisi, A. Popoola

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引用次数: 3

Abstract

ABSTRACT The study of laser cladding of 90Ti-10Al2O3, 90Ti-8Al2O3-2Zn and 90Ti-4Al2O3-6Zn coatings onto Ti-6Al-4V alloy, with intention to produce defect-less, high microhardness and wear resistant coating was carried out. The coatings were deposited onto Ti-6Al-4V alloy at 900 W laser power and 0.6 m/min laser scan speed. Microstructures and phase constituents of the developed coatings were investigated by using a scanning electron microscope (SEM) and X-ray diffractometer correspondingly. Vickers microhardness tester and pin-on-disk tribometer were employed to characterize microhardness and wear behaviour of the Ti-Al2O3/Zn coatings respectively. SEM was also used to examine the worn track. It was observed that 90Ti-10Al2O3 coating yielded optimal microhardness along with maximal wear resistance in comparison to the other coatings and Ti-6Al-4V alloy. It has been established that laser cladding of Ti-Al2O3 coating with Zn contents on Ti-6Al-4V alloy alleviates the formation of cracks, however, microhardness and wear properties are negatively affected.

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Ti-6Al-4V合金表面激光合成Ti-Al2O3/Zn涂层摩擦学和显微硬度的比较研究

研究了在Ti-6Al-4V合金上激光熔覆90Ti-10Al2O3、90Ti-8Al2O3-2Zn和90Ti-4Al2O3-6Zn涂层，以获得无缺陷、高显微硬度和耐磨涂层。在900W激光功率和0.6m/min激光扫描速度下将涂层沉积到Ti-6Al-4V合金上。利用扫描电子显微镜（SEM）和X射线衍射仪对涂层的微观结构和相组成进行了相应的研究。采用维氏显微硬度计和销盘式摩擦计分别对Ti-Al2O3/Zn涂层的显微硬度和磨损行为进行了表征。扫描电镜也被用来检查磨损的轨道。与其他涂层和Ti-6Al-4V合金相比，90Ti-10Al2O3涂层产生了最佳的显微硬度和最大的耐磨性。已经证实，在Ti-6Al-4V合金上激光熔覆含Zn的Ti-Al2O3涂层可以减轻裂纹的形成，但显微硬度和磨损性能会受到负面影响。

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来源期刊

Tribology - Materials, Surfaces & Interfaces MATERIALS SCIENCE, COATINGS & FILMS-

CiteScore

2.80

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