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

Article


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. https://doi.org/10.1016/j.matchemphys.2013.03.022
Article Title

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

ERA Journal ID4965
Article CategoryArticle
AuthorsEtaati, Amir (Author) and Dehghani, Kamran (Author)
Journal TitleMaterials Chemistry and Physics
Journal Citation140 (1), pp. 208-215
Number of Pages8
Year2013
PublisherElsevier
Place of PublicationLausanne, Switzerland
ISSN0254-0584
1879-3312
Digital Object Identifier (DOI)https://doi.org/10.1016/j.matchemphys.2013.03.022
Web Address (URL)http://www.sciencedirect.com/science/article/pii/S0254058413002460
Abstract

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.

Keywordsalloys; deformation; compression and shear; recrystallisation
ANZSRC Field of Research 2020340607. Reaction kinetics and dynamics
401607. Metals and alloy materials
401408. Manufacturing processes and technologies (excl. textiles)
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Byline AffiliationsFaculty of Engineering and Surveying
Amirkabir University of Technology, Iran
Institution of OriginUniversity of Southern Queensland
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