Orthorhombic intermediate phase originating from {110} nanotwinning in Ni50.0Mn28.7Ga21.3 modulated martensite

Straka, Ladislav; Drahokoupil, Jan; Veřtát, Petr; Kopeček, Jaromı́r; Zelený, Michal; Seiner, Hanuš; Heczko, Oleg

doi:10.1016/j.actamat.2017.04.048

Cited by 19 publications

(29 citation statements)

References 46 publications

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“…The formation of the nanotwinned 10M' phase was initially described by Straka et al [7]. Here, based on detailed temperature measurements of the diffraction patterns, we further discuss the evolution and nature of the newly-observed phase.…”

Section: Resultsmentioning

confidence: 59%

“…2. For completeness, the lattice parameters already published and discussed in [7] are also depicted.…”

Section: Resultsmentioning

confidence: 99%

“…Using X-ray diffraction, we discovered recently that a new intermediate phase can form between ordinary 10M martensite and austenite [7]. In alloy of specific composition few tenths of kelvin below the martensitic transformation, the five-layered modulated monoclinic martensite (10M) changed to an orthorhombic intermediate (10M') phase.…”

Section: Introductionmentioning

confidence: 99%

“…In alloy of specific composition few tenths of kelvin below the martensitic transformation, the five-layered modulated monoclinic martensite (10M) changed to an orthorhombic intermediate (10M') phase. The SEM observations, XRD measurements and theoretical calculations indicated that such an intermediate phase could be actually the nanotwinned 10M martensite, with the nanotwinning suggested to be resulting from the complex hierarchical branching on the austenite nucleus -martensite interface [7]. * corresponding author; e-mail: vertat@fzu.cz…”

Section: Introductionmentioning

confidence: 99%

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Study of 10M' Nanotwinned Phase in the Vicinity of Martensitic Transformation in Ni-Mn-Ga Magnetic Shape Memory Alloy

et al. 2018

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Ni50.0Mn28.5Ga21.5 single crystal exhibiting magnetic shape memory effect was analysed by X-ray diffraction, electric resistivity and differential scanning calorimetry. Based on the intensities of the measured diffraction peaks, we discuss the evolution of the structure and microstructure during heating and cooling. Electric resistivity and DSC curves detect anomalous behaviour prior the transformation from martensite to austenite. We ascribe these pre-transformation changes in measured curves to formation of the recently discovered nanotwinned form of 10M martensite.

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Section: Resultsmentioning

confidence: 59%

“…2. For completeness, the lattice parameters already published and discussed in [7] are also depicted.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study of 10M' Nanotwinned Phase in the Vicinity of Martensitic Transformation in Ni-Mn-Ga Magnetic Shape Memory Alloy

et al. 2018

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“…In case that .xrdml file containing multiple scans is loaded, the batch feature is enabled automatically providing the tool to fit the datasets sequentially. This feature has already been used for determination of the temperature development of selected lattice parameters of magnetic shape memory (MSM) alloys [10]. As our program enables determination of very small changes of the lattice parameters, their temperature evolution is clearly observable even in narrow temperature intervals (Figure 3).…”

Section: Additional Functionalitymentioning

confidence: 99%

Fitexc – Diffraction Profile Fitting Program Run in MS Excel

Veřtát

Drahokoupil

2018

APP

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Abstract. We present our custom made diffraction fitting program FitExc for the basic treatment of the 1D diffraction profiles, in particular, the Intensity(2θ) of X-ray, synchrotron or neutron diffraction measurements. In the current state, the program allows for simultaneous fitting of up to three profiles in one data set and is intended to be used mainly for precise lattice parameters determination or fitting of overlapped peaks. The entire program is built in the common MS Excel environment, it does not require any installation and is free to use.

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Building Hierarchical Martensite

Schwabe

Niemann

Backen

et al. 2020

Adv Funct Materials

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Martensitic materials show a complex, hierarchical microstructure containing structural domains separated by various types of twin boundaries. Several concepts exist to describe this microstructure on each length scale, however, there is no comprehensive approach bridging the whole range from the nano‐ up to the macroscopic scale. Here, it is described for a Ni‐Mn‐based Heusler alloy how this hierarchical microstructure is built from scratch with just one key parameter: the tetragonal distortion of the basic building block at the atomic level. Based on this initial block, five successive levels of nested building blocks are introduced. At each level, a larger building block is formed by twinning the preceding one to minimize the relevant energy contributions locally. This naturally explains the coexistence of different types of twin boundaries. The scale‐bridging approach of nested building blocks is compared with experiments in real and reciprocal space. The approach of nested building blocks is versatile as it can be applied to the broad class of functional materials exhibiting diffusionless transformations.

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Orthorhombic intermediate phase originating from {110} nanotwinning in Ni50.0Mn28.7Ga21.3 modulated martensite

Cited by 19 publications

References 46 publications

Study of 10M' Nanotwinned Phase in the Vicinity of Martensitic Transformation in Ni-Mn-Ga Magnetic Shape Memory Alloy

Study of 10M' Nanotwinned Phase in the Vicinity of Martensitic Transformation in Ni-Mn-Ga Magnetic Shape Memory Alloy

Fitexc – Diffraction Profile Fitting Program Run in MS Excel

Building Hierarchical Martensite

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