Poisson's Ratio and Young's Modulus of TiNi Shape Memory Alloy Measured by Electromagnetic Acoustic Transducer

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  • TiNi形状記憶合金のポアソン比とヤング率の電磁超音波法による測定
  • TiNi ケイジョウ キオク ゴウキン ノ ポアソンヒ ト ヤングリツ ノ デンジ チョウオンパホウ ニ ヨル ソクテイ

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In order to investigate the elastic behavior of TiNi shape memory alloy (SMA), Young's modulus (E) and Poisson's ratio (ν) of TiNi SMA during a martensitic transformation process were measured by two methods using mechanical strain gauge and electromagnetic acoustic transducer (EMAT). In particular, EMAT is able to measure the E and ν of materials under static loading condition. As the results, E and ν measured by two different methods were almost the same values. The correlation of E obtained by EMAT and by the stress-strain diagram under a martensitic transformation process was become clear.

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