분무성형-압출에 의한 과공정 Al-Si-X 합금의 제조 및 프로펠러 샤프트 (추진축) 소재로서의 응용 가능성 평가 = Mechanical Behaviors:Fabrication of Hypereutectic Al-Si-X Alloy via Spray Forming & Extrusion and Its Feasibility Tests for a Propeller Shaft Application

다국어 초록 (Multilingual Abstract)

A hypereutectic Al-Si-X alloy was fabricated via spray forming & extrusion to judge the feasibility of the alloy for the application to a propeller shaft, which needs high specific strength as well as high specific modulus. The microstructural evolution of spray formed hypereutectic Al-Si-X alloy during extrusion was studied. The effects of the Si contents, additional elements and heat treatments on the Young's modulus and mechanical properties (UTS, elongation) were also investigated. In additions, the feasibility of the hypereutectic Al-Si-X alloy as a propeller shafts materials was evaluated with respect to S45C steel, 6061 aluminum alloy and Duralcan composite which are being used as a commercialized propeller shaft materials. The hypereutectic Al-Si-X alloy was regarded to have a good competition with S45C steel and 6061 aluminum alloy in reducing a weight and with Duralcan composite in reducing a fabrication cost.

목차 (Table of Contents)

• 1. 서론
• 2. 이론적 배경
• 추진축의 위험회전속도에 대한 재료 물성 및 추진축 사양의 영향
• 음향공진법을 이용한 영률 특정
• 3. 실험 방법
• 분무 성형체 제조 및 압출
• 특성 분석
• 4. 실험 결과 고찰
• 압출에 따른 미세조직 변화
• 기계적 특성
• 5. 결론
• 후기