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Metallurgical and Materials Transactions A
Erschienen in: Metallurgical and Materials Transactions A 10/2010

01.10.2010

Microstructural Evolution During the Hot Deformation of Ti-55Ni (at. pct) Intermetallic Alloy

verfasst von: Aliakbar Khamei, Kamran Dehghani

Erschienen in: Metallurgical and Materials Transactions A | Ausgabe 10/2010

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Abstract

The hot deformation behavior of Ti-55Ni (at. pct) alloy was studied using compression testing at 1173 K (900 °C) to 1323 K (1050 °C) and at the strain rates of 0.001 to 0.35 s−1. The microstructure evolution was characterized using optical and scanning electron microscopy (SEM). The influences of hot-working parameters on the flow stress and microstructural features of this alloy were then analyzed. The results indicate that, depending on the temperature and strain rate, the dynamic recrystallization (DRX) is the dominate mechanism. Besides, the particle-stimulated nucleation (PSN) mechanism could partially recrystallize the structure. The PSN phenomenon is of significant importance for the Ti-55Ni (at. pct) that suffers from insufficient workability because of its high content of intermetallic phases. It is of interest that the discontinuous yielding phenomenon has been observed when the specimens were deformed at 1173 K (900 °C). Finally, the optimum parameters for hot working of Ti-55Ni (at. pct) alloy are determined as well.
Vorheriger Artikel Comparison of Different Synthesis Methods to Produce Lithium Triborate and Their Effects on Its Thermoluminescent Property
Nächster Artikel In-Situ Synthesis of Cu/Cr-Al2O3 Nanocomposite by Mechanical Alloying and Heat Treatment

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Metadaten
Titel
Microstructural Evolution During the Hot Deformation of Ti-55Ni (at. pct) Intermetallic Alloy
verfasst von
Aliakbar Khamei
Kamran Dehghani
Publikationsdatum
01.10.2010
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions A / Ausgabe 10/2010
Print ISSN: 1073-5623
Elektronische ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-010-0338-8

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