The Fundamentals of Metalworking (PDF)
The Fundamentals of Metalworking (PDF)
The Fundamentals of Metalworking (PDF)
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Static and dynamic changes <strong>of</strong><br />
structure during hot forming<br />
• During plastic deformation, new dislocations and vacancies are<br />
produced continuously, which leads to a new state <strong>of</strong> equilibrium<br />
through dynamic recrystallisation and dynamic recovery.<br />
• <strong>The</strong>se two processes take place in the forming zone during<br />
plastic deformation at corresponding stresses and strain rates.<br />
Note:<br />
Dynamic recrystallisation<br />
Dynamic recovery<br />
Hot working (rolling,<br />
forging, extrusion, etc.)<br />
Static recrystallisation<br />
Static recovery<br />
During cooling<br />
• During forming, structure changes through dynamic<br />
recrystallisation and dynamic recovery.<br />
• During cooling or heating, structure changes through<br />
static recrystallisation and static recovery.<br />
Suranaree University <strong>of</strong> Technology Tapany Udomphol<br />
Jan-Mar 2007
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