GATE ME 2014 Set 3 — Question 33

MCQ+1 / -0.33MediumTool Geometry, Materials & WearMachining & Machine ToolsManufacturing Processes

Manufacturing Processes → Machining & Machine Tools → Tool Geometry, Materials & Wear

Last updated 5 September 2026

Question

Cutting tool is much harder than the workpiece. Yet the tool wears out during the tool-work interaction, because

Correct answer (C) extra hardness is imparted to the workpiece due to severe rate of strain Solution During machining, the workpiece material undergoes severe plastic deformation at very high strain rates. This leads to significant strain hardening, which increases the hardness of the workpiece material at the tool-chip interface. This increased hardness contributes to the wear of the cutting tool despite its initial higher hardness. Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (C) extra hardness is imparted to the workpiece due to severe rate of strain Solution During machining, the workpiece material undergoes severe plastic deformation at very high strain rates. This leads to significant strain hardening, which increases the hardness of the workpiece material at the tool-chip interface. This increased hardness contributes to the wear of the cutting tool despite its initial higher hardness.

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