Hot Deformation Behavior and Processing Maps of Pure Copper during Isothermal Compression

Area of Science:

• Materials Science
• Metallurgy
• Mechanical Engineering

Background:

• Understanding the hot deformation behavior of pure copper is crucial for optimizing manufacturing processes.
• Previous research has explored copper's mechanical properties, but a comprehensive constitutive model for hot deformation is still needed.

Purpose of the Study:

• To investigate the hot deformation behavior of pure copper.
• To establish a constitutive equation and processing maps for pure copper.
• To determine optimal hot working parameters for pure copper.

Main Methods:

• Isothermal compression tests were performed on a Gleeble-3500 simulator at temperatures from 350–750 °C and strain rates from 0.01–5 s-1.
• Metallographic observation and microhardness measurements were conducted on hot-compressed specimens.
• True stress-strain curves were analyzed to develop a strain-compensated Arrhenius constitutive model and dynamic material model-based processing maps.

Main Results:

• Flow stress exhibits positive strain rate sensitivity and negative temperature correlation.
• The Arrhenius model accurately predicts flow stress.
• Optimal hot working parameters were identified as 700–750 °C and 0.1–1 s-1 strain rate.

Conclusions:

• The established constitutive model effectively describes pure copper's hot deformation.
• Processing maps provide insights into microstructural evolution.
• The identified optimal parameters can enhance hot working efficiency and product quality for pure copper.