High Energy Rate Forming (HERF) Quiz

1. The flow stress increases with strain rates
2. The temperature of work increases due to adiabatic heating
3. Improved lubrication if lubricating film is maintained
4. Many difficult to form materials like Titanium and Tungsten alloys, can be deformed under high strain rates

The energy of deformation is delivered at a much higher rate than in conventional practice Larger energy is applied for a very short interval of time High particle velocities are produced in contrast with conventional forming process The velocity of deformation is also very large and hence these are also called High Velocity Forming (HVF) processes Many metals tend to deform more readily under extra fast application of force

For many metals, the elongation to fracture increases with strain rate beyond the usual metal working range, until a critical strain rate is achieved, where the ductility drops sharply

The strain rate dependence of strength increases with increasing temperature

The yield stress and flow stress at lower plastic strains are more dependent on strain rate than the tensile strength

The objective and scope of the course include understanding the properties of engineering materials, interpreting phase equilibrium diagrams, selecting proper materials for different applications, understanding heat-treatment processes, powder metallurgy, and non-destructive testing methods.

Examples of mechanical properties include modulus of elasticity, yield strength, tensile strength, ductility, malleability, toughness, and hardness.

Engineering Metallurgy is an interdisciplinary field concerned with the study of characteristics and processing of materials, including metals, ceramics, and plastics, for their properties and uses in science and technology.

Understanding heat-treatment processes is significant for improving the mechanical properties of various components.

The knowledge gained in Engineering Metallurgy can be applied in selecting proper materials for cutting tools, dies, gears, and other applications, as well as in non-destructive testing methods and powder metallurgy processes.