Thermal expansion of Ni2.08Mn0.96Ga0.96 alloy
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The temperature dependence of the thermal expansion of polycrystalline Ni2.08Mn0.96Ga0.96 alloy samples is studied in the as-cast state and after homogenizing annealing. A sample in which twins are mainly oriented normal to the sample length shortens jumpwise during the martensitic transformation. A sample in which twins are parallel to its length elongates jumpwise. After annealing, both samples do not exhibit a jumplike change in length during the phase transformation. When an annealed sample is cooled in a magnetic field, its length again changes jumpwise in the phase transformation range.
KeywordsThermal Expansion Phase Transformation Technical Physic Martensitic Transformation Annealed Sample
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