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| COMPUTER SIMULATION FOR TRANSFORMATION FROM CUBIC PHASE TO TETRAGONAL ORTHORHOMBIC AND MONOCLINIC MARTENSITE Ⅰ. The TiNi Martensite Describing by Two Monoclinic Systems |
| LI Yongsen (Institute ol Metal Research; Academia Siniea; Shenyang) |
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Cite this article:
LI Yongsen (Institute ol Metal Research; Academia Siniea; Shenyang). COMPUTER SIMULATION FOR TRANSFORMATION FROM CUBIC PHASE TO TETRAGONAL ORTHORHOMBIC AND MONOCLINIC MARTENSITE Ⅰ. The TiNi Martensite Describing by Two Monoclinic Systems. Acta Metall Sin, 1986, 22(5): 112-120.
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Abstract The mathematical formula for the martensitic transformation from cubic phase to tetragonal, orthorhombic and monoclinic martensite was derived in the light of phenomenological theory. The computer simulation had been made of a typical thermoelastic material TiNi by advanced several possible martensitic transformation models. They are K_l=(111)_M, (111)_M (twinned crystal type Ⅰ) and η_l=[110]_M (type Ⅱ) on the TiNi(β) where the structural mode of the martensite is characterized by the lattice parameters being a=0.2889, b=0.4120, c=0.4622nm and β=96.8°; and K_l=(111)_M, (111)_M (type Ⅰ)on theTiNi(γ) where the structural mode of the martensite is characterized by the lattice parameters being a=0.2885, b=0.4622,c=0.4120nm and γ=96.8°. Both of them are capable of satisfying the requirements that the interphase interface is the plane of zero average distortion, and are found to be in agreement with the available experimental results given by the other authors.
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Received: 18 May 1986
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