어트리션 밀링법으로 제조된 티타늄합금의 상변화 및 미세조직특성
Phase Changes and Microstructural Properties of Ti Alloy Powders Produced by using Attrition Milling Method.
차성수,
소속 상세정보
차성수 ( Cha Sung-Soo ) - 진주보건대학 치기공과
KMID : 0362120010230010009
Abstract
Microstructure and phase transformation of Ti-Ni-Cu alloy powders produced by using attrition milling method were studied. Mixed powders of Ti-(50-X)Ni-XCu ( at%) in composition range were mechanically alloyed for maximum 20 hours by using SUS 1/4" ball in argon atmosphere. Ball to powder ratio was 50: 1 and impeller speed was 350rpm. Mechanically alloyed with attrition millimg method. powder was heat treated at the temperature up to for 1 hour in the torr vacuum. Ti-Ni-Cu alloy powders have been fabricated by attrition milling method. and then phase transformation behaviours and microstructual properties of the alloy powders were investigated to assist in improving the the high damping capacity of Ti-Ni-Cu shape memory alloy powders. The results obtained are as follows: 1. After heat treating of fully mechanically alloyed powder at for 1hour. most of the B2 and B 19’ phases was formed and were coexisted. 2. The B 19’ martensite were formed in Ti-Ni-Cu alloy powders whose Cu-content is less than 5a/o. where as the B19 martensite in those whose Cu-content is more than 10at%. 3. The powders of as-milled Ti-Ni-Cu alloys whose Cu-contents is less than 5at% are amorphous. whereas those of as-milled Ti-Ni-Cu alloys whose Cu-content is more than 10at% are crystalline. This means that Cu addition tends to suppress amorphization of Ti-Ni alloy powders.
키워드
Ti-Ni alloy; Attrition Milling
원문 및 링크아웃 정보
등재저널 정보