Experimental Characterization of Tool Wear Morphology and Cutting Force Profile in Dry and Wet Turning of Titanium Metal Matrix Composites (Ti-MMCs)

Seyed Ali Niknam,Masoomeh Safavi,Hedayeh Mehmanparast,Marek Balazinski

doi:10.3390/met10111459

Seyed Ali Niknam, Masoomeh Safavi + Show 2 more

Open Access

https://doi.org/10.3390/met10111459

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Abstract

Metal-matrix composites (MMCs) are made of non-metallic reinforcements in metal matrixes, which have excellent hardness, corrosion, and wear resistance. They are also lightweight and may pose a higher strength-to-weight ratio as compared to commercial titanium alloys. One of the MMCs with remarkable mechanical properties are titanium metal matrix composites (Ti-MMCs), which are considered a replacement for super-alloys in many industrial products and industries. Limited machining and machinability studies of Ti-MMCs were reported under different cutting and lubrication conditions. Tool wear morphology and life are among the main machinability attributes with limited attention. Therefore, this study presents the effects of cutting and lubrication conditions on wear morphology in carbide inserts when turning Ti-MMCs. To that end, maximum flank wear (VB) and cutting forces were recorded, and the wear morphologies within the initial period of the cut, as well as the worn condition, were studied under dry and wet conditions. Experimental results denoted that despite the lubrication mode used, abrasion, diffusion, and adhesion mechanisms were the main wear modes observed. Moreover, built-up layer (BUL) and built-up edge (BUE) were the main phenomena observed that increase the tendency of adhesion at higher cutting times.

Highlights

Titanium metal matrix composites (Ti-Metal-matrix composites (MMCs)) are known as a new generation of material that has many advantages over titanium alloys
To evaluate the tool wear morphology, the chemical composition. To remedy this lack of knowledge, the current study presents the effects of cutting and lubrication of the tested wasmorphology, studied
Abrasion mechanism depends on the nature and hardness of hard particles used in the metal composite and built-up layer (BUL) were two main wear phenomena in turning titanium metal matrix composites (Ti-MMCs)

Summary

Introduction

Titanium metal matrix composites (Ti-MMCs) are known as a new generation of material that has many advantages over titanium alloys. It is recognized by reinforcements such as titanium carbide particles (TiC), titanium boride (TiB) and continuous or discontinuous silicon carbide fiber (SiC) [1,2]. Reinforced MMCs with ceramic particles have several advantages over their base metals, including unique strengths, higher wear resistance at high temperatures, and thermal stability coefficients. Cr as binders rapid abrasion in cutting in core several studies [9],Co the permitted levels of maximum. That is composed ofElemental three distinct regionsofdue to increased tool composites wear with (Ti-MMCs) cutting time:.

Experimental

Materials and Methods

Dry Mode

According to Figure

Conclusions