Constitutive analysis to predict high-temperature flow behavior of BFe10-1-2 cupronickel alloy in consideration of strain. (January 2015)

• Record Type: Journal Article
• Authors: Cai, Jun; Wang, Kuaishe; Miao, Chengpeng; Li, Wenbing; Wang, Wen; Yang, Jie
• Is Part Of: Materials & design. Volume 65(2015:Jan.)
• Page Start: 272
• Page End: 279
• Publication Date: 2015-01
• Subjects: Cupronickel alloy -- Constitutive equation -- Flow stress -- Hot compression deformation; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2014.09.028
• Languages: English
• ISSNs: 0264-1275

Abstract

Highlights: The constitutive equation of BFe10-1-2 alloy considering the effect of strain was proposed. The developed constitutive equation can precisely predict the flow stress. The predictability of developed constitutive equation was quantified. Abstract: Isothermal compression of BFe10-1-2 cupronickel alloy was carried out on a Gleeble-3800 thermal simulation machine in a wide range of temperatures (1023–1273 K) and strain rates (0.001–10 s −1 ). Then the experimental stress–strain data from isothermal hot compression tests were used to develop the constitutive equation. The effects of temperature and strain rate on deformation behaviors a represented by Zener–Holloman parameter in an exponent-type equation. The strain-dependent constitutive equation of BFe10-1-2 cupronickel alloy was proposed. Subsequently, the correlation coefficient ( R ) and the average absolute relative error ( AARE ) were introduced to verify the validity of developed constitutive equation, and values of R and AARE were 0.988 and 5.663% respectively, which indicated that the strain-dependent constitutive equation can lead a good agreement between the calculated and measured flow stresses in the elevated temperature range for the BFe10-1-2 cupronickel alloy.