| Abstract |
| Room temperature deformation behavior of a Fe-base intermetallic alloy with the composition of Fe-24 at.% Al has been investigated in this study. Phase composition and degree of order in Fe-24 at.% Al alloy were varied by aging at temperatures corresponding to the various phase fields of DO_3, α+DO_3, α+B2, and B2 to elucidate the effects of microstructure and degree of order on the room temperature deformation behavior. Load relaxation tests were conducted at room temperature and the results were analyzed based on the internal variable theory of inelastic deformation. Room temperature strength of the Fe-24 at.% Al alloy appeared to increase with decreasing degree of order and the hardening effect of disordered α precipitation was found to depend on the shape. All flow curves could be successfully described by the constitutive equations of the internal variable theory and the strain rate sensitivities of the Fe-24 at.% Al alloy at room temperature were very small governed by the frictional stress element. |
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| Key Words |
| Fe-24 at.% Al alloy , Degree of order , α - precipitation , Load relaxation , Internal variable theory , Strain rate sensitivity |
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