발간논문

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Vol.31, No.5, 586 ~ 591, 1993
Title
Mechanical properties of Hot - Pressed Metastable Ti50Al50 Powders Prepared by Mechanical Alloying
안중호Jung Ho Ahn, 최철진Chul Jin Choi, 정형식Hyun Sik Chung
Abstract
Elemental Ti＋Al powder mixtures ((Ti_(50)Al_(50)) have been mechanically alloyed (MA) to obtain amorphous and/or nanocrystalline powders using a conventional horizontal ball milling. The MA metastable powders were then vacuum hot pressed(VHP) at 1000℃ for 1 hour, followed by an annealing at 1200℃ for 8 hours. Very fine microstructures were retained after the hot pressing and the subsequent annealing, less than 1㎛ in grain size. The result obtained by a compression testing on the annealed specimens shows a good combination of fracture strength and ductility as compared to cast specimen. Very fine grain structure might be the major cause of the property improvement.
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