A study on hot deformation behavior of Ni-42.5Ti-7.5Cu alloy

Etaati, Amir and Dehghani, Kamran (2013) A study on hot deformation behavior of Ni-42.5Ti-7.5Cu alloy. Materials Chemistry and Physics, 140 (1). pp. 208-215. ISSN 0254-0584

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To investigate the hot deformation behavior of the Ni-42.5Ti-7.5Cu (wt%) alloy, hot compression tests were carried out at the temperatures from 800 C to 1000 C and at the strain rates of 0.001 s-1 to 1 s-1. The results show that the occurrence of dynamic recrystallization (DRX) is the dominate restoration mechanism during the hot deformation of this alloy. There is an increase in peak and steady state stresses with decreasing the deformation temperature and increasing the strain rate. The experimental results were then used to determine the constants of developed constitutive equations. There is a good agreement between the measured and predicted results indicating a high accuracy of developed model.
Zenere-Hollomon (Z) parameter, calculated based on the developed model, indicates that DRX was postponed when the logarithm of the Zenere-Hollomon parameter fell around 33 at strain rate of 0.001 s-1 and temperature of 900 C. This phenomenon can be regarded as the interactions between solute atoms and mobile dislocations. The established constitutive equations can be used to predict and analyze
the hot deformation behavior of Ni-42.5Ti-7.5Cu alloy.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version made not accessible.
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 20 May 2013 23:15
Last Modified: 11 Jul 2014 04:22
Uncontrolled Keywords: alloys; deformation; compression and shear; recrystallisation
Fields of Research : 03 Chemical Sciences > 0307 Theoretical and Computational Chemistry > 030703 Reaction Kinetics and Dynamics
09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
09 Engineering > 0910 Manufacturing Engineering > 091006 Manufacturing Processes and Technologies (excl. Textiles)
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1016/j.matchemphys.2013.03.022
URI: http://eprints.usq.edu.au/id/eprint/23333

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