Thermal Stability of Nonequilibrium Lamellar Structure in γ-TiAl-based Two-phase Alloy

Zhang Lichun; Wang Jinguo; Chen Guoliang; Ye Hengqiang

doi:10.13374/j.issn1001-053x.1997.01.016

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Zhang Lichun, Wang Jinguo, Chen Guoliang, Ye Hengqiang. Thermal Stability of Nonequilibrium Lamellar Structure in γ-TiAl-based Two-phase Alloy[J]. Chinese Journal of Engineering, 1997, 19(1): 79-84. doi: 10.13374/j.issn1001-053x.1997.01.016

Citation:

Zhang Lichun, Wang Jinguo, Chen Guoliang, Ye Hengqiang. Thermal Stability of Nonequilibrium Lamellar Structure in γ-TiAl-based Two-phase Alloy[J]. Chinese Journal of Engineering, 1997, 19(1): 79-84. doi: 10.13374/j.issn1001-053x.1997.01.016

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Thermal Stability of Nonequilibrium Lamellar Structure in γ-TiAl-based Two-phase Alloy

doi: 10.13374/j.issn1001-053x.1997.01.016

1. State Key Laboratory for Advanced Metals and Materials, UST Beijing, Beijing 100083, China;
2. Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Academia Sinica, Shenyang 110015, China

Received Date: 1996-11-12
Available Online: 2021-08-27

Abstract

Abstract

The structural changes of nonequilibrium interlamellar boundaries with a relatively high strain energy during subsequent 800℃, 15 min, WQ and 1000℃, 4 min, WQ annealing were studied by the conventional and high resolution transmission electron microscopy in the hot-forged Ti-45Al-8Nb-2.5Mn-0.05B alloy. The structural relaxations are mainly as following:further bending of interlamellar boundaries, necking and spheroidization process of α₂ plates, formation of subgrain boundaries within γ plates, etc..
- α₂/γ,γ/γ interlamellar boundary,
- necking,
- spheroidization,
- subgrain boundary