The Fundamentals of Metalworking (PDF)

Example: Plastic working in two-phase two phase alloys
The plastic working characteristics of two-phase alloys depends on the
microscopic distribution of the two phases.
• A high V f of hard uniformly dispersed particles increases the flow stress
and makes working difficult.
• Hard and massive particles tend to fracture on deformation with
softer matrix.
• Second phase particles or inclusions will be distorted in the principal
working direction (fibrous structure)- affect mechanical properties.
• Precipitation hardening during hot working results in high flow stress
and lowered ductility.
Working
direction
microcrack
Cracked particle in softer matrix.
Second phase particles
Alignment of second phase
particles along the principal
working direction.
Suranaree University of Technology Tapany Udomphol
Jan-Mar 2007