Abstract
This paper investigates the particle fracture and debonding during machining of metal matrix composite (MMC) due to developed stress and strain, and interaction with moving tool by finite element analysis. The machining zone was divided into three regions: primary, secondary and tertiary deformation zones. The tendency of particles to fracture in each deformation zone was investigated. The findings of this study were also discussed with respect to the experimental results available in the literature. It was found that particles at the cutting path in the tertiary deformation zone fractured as it interacted with tool. In the secondary deformation zone, particles interacted with other particles as well as cutting tool. This caused debonding and fracture of huge number of particles as those were moving up along the rake face with the chips. No particle fracture was noted at the primary deformation zone. The results obtained from finite element analysis were very similar to those obtained from experimental studies.
Highlights
This paper investigates the particle fracture and debonding during machining of metal matrix composite (MMC) due to developed stress and strain, and interaction with moving tool by finite element analysis
Existing functional materials have attained their performance limits, and designers are looking to metal matrix composites (MMCs) to provide additional strength, stiffness, wear resistance and temperature capabilities required for advanced applications in aerospace, automobile, etc [1]
Particle fracture and debonding are mainly controlled by tool-particle interaction, and stress, strain and strain rate developed at different locations of machining zone
Summary
Existing functional materials have attained their performance limits, and designers are looking to metal matrix composites (MMCs) to provide additional strength, stiffness, wear resistance and temperature capabilities required for advanced applications in aerospace, automobile, etc [1]. Their application is somewhat restricted by poor ductility, low fracture toughness and tendency to fracture [2]. The complexities such as worse surface quality and higher tool wear are unavoidable during machining though MMCs inherit better mechanical properties comparing to its constituents and conventional materials [3]. This paper investigates the particle fracture and debonding in detail during machining of MMC in primary, secondary and tertiary deformation zones
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