NDLI: Constitutive analysis and processing map for hot working of a Ni-Cu alloy

Content Provider	Springer Nature Link
Author	Ebrahimi, Gholam Reza Momeni, Amir Abbasi, Seyed Mehdi Monajatizadeh, Hossein
Copyright Year	2013
Abstract	The hot deformation behavior of a Ni-Cu alloy was studied using hot compression testing in the temperature range of 950 °C–1150 °C and at strain rates of 0.001 s$^{−1}$-1 s$^{−1}$. Flow curves at low strain rates, up to 0.01 s$^{−1}$, were typical of DRX characterized by a single peak, while at higher strain rates, the typical form of a DRX flow curve was not observed. The power-law constitutive equation was used to correlate flow stress to strain rate and temperature, and the apparent activation energy of hot deformation was determined to be about 462.4 kJ/mol. The peak strain and stress were related to the Zener-Hollomon parameter and the modeling formula was proposed. The dependence of flow stress to the Z changed at ln Z=38.5, which was considered to be a critical condition for the change in the mechanism of dynamic recrystallization. The efficiency of power dissipation was determined to be between 10–35 percent at different deformation conditions. According to the dynamic material model, stable flow was predicted for the studied temperature and strain rate ranges. Highly serrated grain boundaries at low strain rates were considered to be a reason for the occurrence of continuous dynamic recrystallization. On the contrary, at high strain rates, equiaxed grain structure was attributed to the typical discontinuous dynamic recrystallization.
Starting Page	11
Ending Page	17
Page Count	7
File Format	PDF
ISSN	15989623
Journal	Metals and Materials
Volume Number	19
Issue Number	1
e-ISSN	20054149
Language	English
Publisher	The Korean Institute of Metals and Materials
Publisher Date	2013-01-10
Publisher Place	Springer
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	hot compression dynamic recrystallization flow curve Ni-Cu alloy Metallic Materials Operating Procedures, Materials Treatment Magnetism, Magnetic Materials Engineering Thermodynamics, Heat and Mass Transfer Characterization and Evaluation of Materials Continuum Mechanics and Mechanics of Materials
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Condensed Matter Physics

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