Structural analysis and martensitic transformation in equiatomic HfPd alloy

Hisada, Shota; Matsuda, Mitsuhiro; Takashima, Kazuki; Yamabe‐Mitarai, Yoko

doi:10.1016/j.jssc.2017.12.002

Cited by 12 publications

(3 citation statements)

References 18 publications

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“…The origin of the crossing of the curves before and after the transformation on both samples may have originated from the thin sample thickness of 0.5 mm and the oxidation at high temperature. It can be noted that the 90 • sample in Figure 1a shows the same direction of shape change due to martensitic transformation as the Ti-Ni alloy [7] and the Ti-Ni-Pd alloy [8], whereas the 0 • sample in Figure 1b shows the same behavior as the Hf-Pd alloy [9] and the Fe-Ni alloy [10]. This supports that the direction of shape change corresponding to the cut surface with the same alloy depends on the crystal orientation.…”

Section: Resultsmentioning

confidence: 99%

“…There have been some reports on the shape change due to the reverse martensitic transformation related to shape recovery. The Ti-Ni alloy [7] and the Ti-Ni-Pd alloy [8] change shape in the direction of shrinkage with martensitic transformation, whereas the Hf-Pd alloy [9] and the Fe-Ni alloy [10] change shape in the expanding direction. Furthermore, Wang et al reported that the amount and direction of shape change in Ti-Ni and Ti-Ni-Fe alloys subjected to cold rolling were significantly different with the reduction ratio in the rolling direction, the transversal direction, and the normal direction [11].…”

Section: Introductionmentioning

confidence: 99%

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Shape Change and Crystal Orientation of B19 Martensite in Equiatomic TiPd Alloy by Isobaric Test

Hisada

Matsuda

Yamabe‐Mitarai

2020

Metals

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We investigated the texture and the shape change in the equiatomic TiPd alloy, and discussed the relationship between the shape change and the atomic movements associated with martensitic transformation. Thermomechanical analyzer tests indicate that the direction of the shape change was different between the 0° and 90° samples, cutting out parallel and perpendicular to the hearth side of button ingot, respectively. In the 0° sample, shrinking and expansion were observed during the reverse and forward martensitic transformations, respectively, whereas the opposite tendency was confirmed in the 90° sample compared to the 0° sample. During the isobaric test, the martensitic variants were oriented to a (010) plane with compressive loading, and the B2 parent phase crystals also became coarse. There is a close relationship between the shape change due to the crystal orientation by the isobaric test and the shear-shuffling direction due to martensitic transformation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Shape Change and Crystal Orientation of B19 Martensite in Equiatomic TiPd Alloy by Isobaric Test

Hisada

Matsuda

Yamabe‐Mitarai

2020

Metals

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“…Hisada et al investigated Hf–Pd alloy and martensitic transformation by electron diffraction and X‐ray diffraction. [ 7 ] Waterstrat and Kuentzler studied the structural stability of binary Zr–Pd alloy. [ 8 ] In recent years, first‐principles study is widely recognized as a very effective method for the research and analysis of phase stability, mechanical properties, and electronic properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of Pressure on the Structural, Mechanical, and Electronic Properties and Debye Temperature of Pd‐Based Alloy: First‐Principles Calculation

Wang

Zhang

et al. 2020

Physica Status Solidi (b)

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Herein, the structural, mechanical, and electronic properties of Pd doped with Ti under different pressures are studied, using first-principles calculations. The formation enthalpy is negative, demonstrating that the structure of the Pd-Ti alloy is thermodynamically stable. The corresponding mechanical stability conditions prove that the Pd-Ti alloy is mechanically stable. Moreover, the shear modulus, bulk modulus, ratios of bulk modulus to shear modulus, hardness, and Poisson's ratio are calculated. The results indicate that the hardness, ductility, and plasticity of the Pd-Ti alloy improve. In addition, the density of states, bond population, and Debye temperature as functions of pressure are investigated, revealing that the Pd-Ti alloy is metallic and the pressure does not make a huge change to the structure of the Pd-Ti alloy and makes the thermal conductivity and interatomic bonding of the Pd-Ti alloy improved. Theoretical basis is also provided for further research on Pd-based alloys which probably have good prospects for superalloys.

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Phase transformation and mechanical properties of HfPd ultra-high temperature shape memory alloys

2019

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Structural analysis and martensitic transformation in equiatomic HfPd alloy

Cited by 12 publications

References 18 publications

Shape Change and Crystal Orientation of B19 Martensite in Equiatomic TiPd Alloy by Isobaric Test

Shape Change and Crystal Orientation of B19 Martensite in Equiatomic TiPd Alloy by Isobaric Test

Effects of Pressure on the Structural, Mechanical, and Electronic Properties and Debye Temperature of Pd‐Based Alloy: First‐Principles Calculation

Phase transformation and mechanical properties of HfPd ultra-high temperature shape memory alloys

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