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The B2-B19-B19' transformation in Ti-(45-x)Ni-5Cu-xMn (at%) (x = 0.5-2.0) alloysopen access
- Authors
- Jeon, Y.-M.; Kim, M.-G.; Kim, M.-S.; Lee, Y.-H.; Im, Y.-M.; Nam, T.-H.
- Issue Date
- 2011
- Keywords
- B19 martensite; Superelasticity; Ti-Ni-Cu-Mn alloys; Transformation behavior; Workability
- Citation
- Transactions on Electrical and Electronic Materials, v.12, no.1, pp 24 - 27
- Pages
- 4
- Indexed
- SCOPUS
KCI
- Journal Title
- Transactions on Electrical and Electronic Materials
- Volume
- 12
- Number
- 1
- Start Page
- 24
- End Page
- 27
- ISSN
- 1229-7607
2092-7592
- Abstract
- Effect of substitution of Mn for Ni on transformation behavior, shape memory characteristics and superelasticity of Ti45Ni-5Cu alloy has been investigated by means of electrical resistivity measurements, X-ray diffraction, thermal cycling tests under constant load and tensile tests. The one-stage B2-B19' transformation occurred when Mn content was 0.5 at%, above which the two-stage B2-B19-B19' transformation occurred. A temperature range where the B19 martensite exists was expanded with increasing Mn content because decreasing rate of Ms (60 K/% Mn) was larger than that of Ms' (40 K/% Mn). Ti-(45-x)Ni-5Cu-xMn alloys were deformed in plastic manner with a fracture strain of 60 % ~ 32 % depending on Mn content. Clear superelasticity was found in fully annealed Ti-(45-x)Ni-5Cu-xMn alloys with Mn content more than 1.0 at%, which was ascribe to a solid solution hardening by substitution of Mn for Ni. ? 2011 KIEEME. All rights reserved.
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