Influence of hot working on mechanical and physical properties of an Fe – Ni – Co alloy

✍ Scribed by Abbasi, Seyed Mehdi; Momeni, Amir; Morakkabati, Maryam; Mahdavi, Rashid

• Book ID: 124073689
• Publisher: Carl Hanser Verlag
• Year: 2014
• Tongue: English
• Weight: 840 KB
• Volume: 105
• Category: Article
• ISSN: 1862-5282
• DOI: 10.3139/146.111078

✦ Synopsis

Influence of hot working on mechanical and physical properties of an Fe-Ni-Co alloy

The flow behavior, mechanical and physical properties of alloy Fe-29 Ni-17 Co were studied using hot compression and hot rolling tests over the temperature range of 900 8C to1 200 8C and strain rates of 0.001 s -1 to 1 s -1 . At temperatures below 1 100 8C, the flow curves were similar to those of dynamic recovery; whereas, at higher temperatures, faint peaks appeared on the flow curves. A modified power-law constitutive equation was used to model the dependences of flow stress on temperature and strain rate in different deformation regimes. The Kocks-Mecking equation was used to model the flow curves and to measure the mean flow stress of the material in hot rolling. The samples hot rolled at 1 100 -1 200 8C to a reduction of 30 -40 % showed the best combination of ductility and strength and low thermal expansion coefficient. Microstructures of the hot rolled samples indicated that hot rolling at 1 100 -1 200 8C to reduction of 30 -40 % leads to complete dynamic recrystallization.