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기계적합금화시킨 TiNi 분말의 열처리조건에 따른 상변화 및 Al/TiNi소결체 내에서의 미세조직 특성 KCI 등재

Phase Changes of Mechanically Alloyed TiNi Powders by Heat-treatment and Microstructural Properties in the Al/TiNi Sintered Materials

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  • URLhttps://db.koreascholar.com/Article/Detail/2003
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한국분말야금학회지 (Journal of Korean Powder Metallurgy Institute)
한국분말재료학회(구 한국분말야금학회) (Korean Powder Metallurgy Institute)
초록

Microstructure and phase transformation of mechanically alloyed TiNi powders added to aluminium matrix for enhancing the damping properties were studied. Four compositions between 48.5 and 51.5 at% Ti intermetallic compounds were selected to control the fraction of martensite phase. Mechanically alloyed TiNi powders were heat-treated at vacuum of torr for crystallization. Ball milled AI/TiNi composite powders were swaged at room temperature and rolled at 450 . After mechanical alloying for 10 hours, Ti and Ni elements were alloyed completely and amorphous phase was formed. Amorphous phase was crystallized to martensite (Bl9') and austenite(B2) after heat treating for 1 hour at the temperature of 850 , and TiNi, intermetallic compound was partially formed. Considerable amount of martensite phase was remained after swaging and rolling.

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