http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Jeffrey A. Lacey (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
New anti-wear alloy development & Biomass-caused equipment wear issues & mitigation strategy
Kyungjun Lee,Peter Blau,Jeffrey A. Lacey,George R. Fenske,Jun Qu 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.5
Quasicrystals have been used in various applications to improve wear resistance as well as friction. It is known that quasicrystal (i-phase) content and microstructure in alloys have a decisive effect on the mechanical properties, tribological performance, and corrosion behavior. In this research, four (β+i)-dual-phased quasicrystal alloys with different i-phase content and grain size were developed to alleviate the brittleness of the i-phase with the help of the soft β-phase. The influences of the i-phase content and grain size were investigated through impact test, wear test, and corrosion analysis. Through the annealing process, the amount of the i-phase was increased by about 38% (59.24% → 81.75%), and, besides, the grain size of the i-phase was simultaneously increased from 3.47 ㎛ up to 9.98 ㎛. As the amount of i-phase increased, it was possible to increase the hardness from 712 HV to 763HV. Meanwhile, the increased grain size (i-phase) reduced the contact stress of the grain during wear testing; thus, the specific wear rate could be decreased from 2.21×10<sup>-4</sup>mm³/Nm to 0.5×10<sup>-4</sup>mm³/Nm. Not only that, but an experimental wear equation was obtained using empirical data to predict the wear behavior of the dual phased alloys. As the second topic, the cutting tools’ material and working conditions are one of the most critical factors that directly affect the economic efficiency of the biomass size reduction process. Various biomass and accompanying extrinsic inorganic compounds like sand particles cause severe wear on the cutting tools. The generated wear modes varied, such as abrasive, erosive, and impact wear. In particular, the degree of wear of the blade cutting edge determines the cutting efficiency. Thus, by investigating the worn blades, we revealed the wear mechanism and measured the cutting edge’s rounding radius. Based on the results, candidate materials were selected, and a two-body and three-body abrasion test (ORNL) was conducted to compare and evaluate with the conventional blade. This study will provide a great indicator of the wear mechanism analysis and the material selection for diverse biomass comminution equipment.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
