Hall-Petch relationship in two-phase TiAl alloys with fully lamellar microstructures |
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| Authors: | Jiancheng Tang Baiyun HuangYuehui He Wensheng LiuKechao Zhou Aihua Wu |
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| Affiliation: | State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, PR China |
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| Abstract: | The dependences of the room temperature tensile properties of two-phase TiAl alloys with fully lamellar microstructures on colony size and the effects of alloying elements on the k value of Hall-Petch relationship were investigated. It is found that the ultimate tensile strength and the yield strength show Hall-Petch dependences on colony size, but the ductility does not obey a Hall-Petch dependence on colony size. The k value of Hall-Petch relationship increases when Ti-47Al (at.%) is alloyed with interstitial elements C or B, but the additions of substitutional elements Cr or Nb don’t lead to its apparent change. |
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| Keywords: | A Intermetallic compounds A Structural materials D Mechanical properties D Microstructure |
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