Strain glass in doped Ti50(Ni50−xDx) (D=Co, Cr, Mn) alloys: Implication for the generality of strain glass in defect-containing ferroelastic systems
In: Acta Materialia, Jg. 58 (2010-09-01), S. 5433-5442
Online
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Zugriff:
Strain glass is a new glassy state discovered recently in Ni-rich Ti–Ni ferroelastic alloys. However, it remains unclear whether or not strain glass can be found in a wide range of ferroelastic systems. Here, we investigated the transition behavior of three different defect-doped systems Ti 50 (Ni 50− x D x ) (D = Co, Cr, Mn) and found a striking similarity in their transition behavior as a function of defect concentration x . In all these systems, there exists a critical doping level x c at which the transition behavior shows an interesting crossover. At x x c , these materials undergo a martensitic transition and the transition temperature decreases with increasing x . However, at x > x c , the martensitic transition is suppressed and a strain glass transition occurs. These results imply that strain glass may be quite general in defect-containing ferroelastic systems. An analysis with a modified Landau-type free energy landscape suggests that although point defects always favor the formation of strain glass, to actually form a strain glass they need to destabilize the martensite of the system.
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Strain glass in doped Ti50(Ni50−xDx) (D=Co, Cr, Mn) alloys: Implication for the generality of strain glass in defect-containing ferroelastic systems
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Autor/in / Beteiligte Person: | Zhang, Zhen ; Zhou, Yumei ; Zhang, Jian ; Xue, Dezhen ; Wang, Dong ; Ding, Xiangdong ; Ren, Xiaobing ; Wang, Yu ; Otsuka, Kazuhiro ; Sun, Jun |
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Zeitschrift: | Acta Materialia, Jg. 58 (2010-09-01), S. 5433-5442 |
Veröffentlichung: | Elsevier BV, 2010 |
Medientyp: | unknown |
ISSN: | 1359-6454 (print) |
DOI: | 10.1016/j.actamat.2010.06.019 |
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