인문학
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예술체육학
복합학
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Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Abstract In this study, aluminium surface nano-composites were made by adding secondary phase reinforcement powder particles to the surface and sub-surface layers using friction stir processing (FSP). The study examines the development and tribological properties of aluminium-based surface nano-composites. Initial processing of tungsten (W) and aluminium-oxide (Al 2 O 3 ) elemental powders involved high-energy ball milling to minimize particle size. After 25 h of milling, the tungsten grain size was 5 nm, while aluminium-oxide was 11 nm after 32 h. FSP was used to integrate these nanostructured reinforcement particles into the aluminium matrix. Hardness and wear tests were performed on these composites. From base to processed, composite hardness increased. More tool passes improved hardness and wear. The friction stir processed (FSPed) second-pass aluminium–tungsten specimen has 96 times greater wear resistance than the base material. The FSPed second-pass specimen of aluminium–tungsten surface composite, which had maximum wear resistance, was depth-sensing nanoindented at various peak loads and loading rates. Nano-hardness was 1.56 ± 0.33 to 1.26 ± 0.15 GPa (420 ± 3 MPa for base material). Elastic modulus readings were 93 ± 1 to 72 ± 1 GPa (70 ± 1 for base material).
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오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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