증류수 및 수도수 중에서 방열기로 사용되는 알루미늄합금재의 온도 변화, 탈기에 의한 개로전위, 부식전류밀도에 관하여 연구한 결과 다음과 같은 결론을 얻었다. 1. ... test was carried out in distilled and tap water for the investigation on the corrosion behavior of Al-alloy
alloy and Al-12Si alloy powders. ... segregation of the α- Si precipitates, and the Cu content was controlled to induce the formation of Al2Cu ... fabricated using direct energy deposition (DED) additive manufacturing by adjusting the feeding speeds of Al6061
, Al(Cr) and Al7Cr phases. ... As a result, the upper part of the coating layer was observed to mainly consist of Al3Zr and Al8Cr5 phases ... ) and Al7Cr phases when there was minimal surface melting of Zr base in the laser process.
최근 FRP 선박의 폐선 처리문제, 환경 규제의 강화, 자원 재활용 등의 관점에서 소형 알루미늄 합금 선박의 건조가 증가하는 추세이다. ... 따라서 본 연구에는 캐비테이션에 의한 손상을 방지하여 내구 수명을 연장시키기 위한 방법으로 워터 캐비테이션 피닝 기술을 선박용 알루미늄 합금에 적용하였다. ... 선박용 알루미늄 합금 5456-H116, 5083-H321 그리고 5052-O는 워터캐비테이션 피닝을 실시함으로써 내캐비테이션 특성이 워터 캐비테이션 피닝을 하지 않은 시편보다 무게감소량이
Al-Si합금의 용탕처리 1. 실험 목적 가. ... 후 그 조직을 관 찰하고 D.I값을 측정하여 비교해본다. 2) Al-Si합금 용탕을 아무것도 첨가 하지 않은 것, Al-Sr 100ppm만큼 첨가한 것, Al-Sr 200ppm만큼 ... %, Ti 0.01%) 2) GBF처리시의 조건 Rotor r.p.m : 370, Ar가스 유량 : 분당 5L 3) 첨가되는 모합금 : Al - 10%Sr, Al - 5%Ti - 1%
High-entropy alloys (HEAs) are characterized by having five or more main elements and forming simple solids without forming intermetallic compounds, ..
The addition of TiB in the Al-12%Si alloy reduced the size of the primary α-Al and eutectic Si phases ... Al-12%Si alloys were prepared by die casting at 660 oC. ... In order to develop a new commercialAl-12%Si casting alloy with improved physical properties, we investigated
Strong Al-Mn reactions can restrain Kirkendall void formation in Ti-Al-xMn powder alloys and result in ... compression properties are also analyzed for the Ti-Al-xMn powder alloys. ... Herein, pre-forms of Ti-Al-xMn powder alloys are fabricated by compression forming.
Intermetallic compounds of Al11Ce3 were observed in all alloys, while the β-phase of Al3Mg2 was observed ... In this study, changes in the microstructure and mechanical properties of cast and extruded Al-2Li-1Ce ... The density decreased to 2.485, 2.46 and 2.435 g/cm3 when the Mg content in the Al-2Li-1Ce alloy was
, which causes Mg depletion in the Al matrix. ... The effects of annealing on the microstructure and mechanical properties of Al–Zn–Mg–Cu–Si alloys fabricated ... Meanwhile, the HEBM-sintered alloy contains Mg-free Si and θ-Al2Cu phases due to the formation of MgO
The effect of Cr/Ti/Al elements in the alloy on high temperature oxidation was investigated using an ... Pits of several μm depth containing high-Al content oxide was observed at the boundary between the oxide ... formation in the center of the oxide layer, ② Cr-oxide formation surrounding the inner oxide layer, and ③ Al-oxide
In this study, an Al82Ni7Co3Y8 (at%) bulk metallic glass is fabricated using gas-atomized Al82Ni7Co3Y8 ... The sintered Al82Ni7Co3Y8 bulk metallic glasses exhibit crystallization behavior and crystallization ... enthalpy similar to those of the Al82Ni7Co3Y8 powder with 5 m or less and it is confirmed that no crystallization
or polymeric additive solution route for developing a uniform dispersion of Y2O3 particles in Fe-Cr-Al-Ti ... alloys exhibited densified microstructure and the formation of large reaction phases due to oxidation of Al
일반적으로 중성용액 하에서 알루미늄 합금은 부동태피막(Al2O3나 Al2O3·3H2O)을 형성한다. ... 본 연구에서는 해수환경 하에서 부식 문제점을 해결하기 위해 Al-4.5%Mg-0.6%Mn 알루미늄 합금에 대하여 정전위 방식 기술을 적용하였다. ... In general, aluminum alloys forms the passive film(Al2O3, Al2O3·3H2O) in neutral solution.
The designed Alalloy was processed by casting, extrusion and drawing processes. ... In this study, an Al-0.7wt%Fe-0.2wt%Mg-0.2wt%Cu-0.02wt%B alloy was designed to fabricate an aluminum ... The drawn Alalloy wire was then annealed at various temperatures of 200 to 400 °C for 30 minutes.
than in Al-5.5Mg-2.9Si alloy. ... The rolling workability was better for the Al-7Mg-0.9Zn alloy than for the Al-5.5Mg-2.9Si alloy; in case ... Work hardening ability after cold rolling was also higher in the Al-7Mg- 0.9Zn alloy than in the Al-5.5Mg
Although the Ti–6Al–4V alloy has been used in the aircraft industry owing to its excellent mechanical ... investigate the effect of bulk shape on the microstructure and mechanical properties of L-PBFed Ti-6Al
It was concluded that this experimental approach can predict diverse welding conditions for Ti-6Al-4V ... In this study, fiber laser welding was conducted on 8.0mm thick Ti-6Al-4V alloy using the Bead On Plate
본 연구는 구리 아연 금속합금의 산화 환원 반응과 합성 알루미늄 실리케이트의 흡착 반응을 이용한 폐수 중 중금속 처리에 관한 연구이다. ... 극세사 형태로 제조된 금속합금 물질은 표면적이 커서 1회 처리만으로도 반응 평형에 도달하게 하여 효율이 높은 것으로 나타났다. ... 극세사 형태로 제조된 구리 아연 금속합금이 수용액 중에 서 산화 환원반응에 의해 아연보다 이온화 경향이 작은 중금속은 환원 처리되고, 이온화 된 아연 및 미 반응 중금속은 흡착 처리하여