当前位置: X-MOL 学术Tribol. Int. › 论文详情
Fretting wear behavior of cobalt - Based superalloys at high temperature – A comparative study
Tribology International ( IF 4.271 ) Pub Date : 2020-01-03 , DOI: 10.1016/j.triboint.2019.106155
Ahmed Korashy, Helmi Attia, Vince Thomson, Saeid Oskooei

Superalloys are extensively used in the design of combustor components of aero engines because they can withstand high temperature oxidizing environments, while maintaining their strength. This investigation aims at assessing the tribological characteristic of some combustor components candidate cobalt-based and nickel-based superalloys. Three combinations of the alloys were tested at different operating conditions and temperatures; CP1 (Cobalt 1/Cobalt 2), CP2 (Cobalt 2/Nickel 1) and CP3 (Cobalt 1/Nickel 1). The investigation showed that the increase in temperature from 350 °C to 550 °C was associated with a decrease in the coefficient of friction for all tested contact pairs, a decrease in wear coefficient (wear damage) for CP1, and an increase in wear coefficient for CP2 and CP3. Samples analysis using SEM-EDS and Raman Spectroscopy showed that the least wear coefficient exhibited by CP1 at 550 °C, and by CP2 at 350 °C is due to the development of a compacted protective layer of chromium oxide Cr2O3, known for its favourable tribological characteristic, which contributes to load bearing, precludes the metal-metal contact, and reduces the friction and wear damage. On the other hand, the decrease in friction was associated with an increase in wear coefficient for CP2 and CP3 due to the formation of a porous oxide layer with high tungsten trioxide (WO3) content which makes the oxide softer, decreases friction and increases the wear damage in the oxide layer. Material selection maps are presented to aid aero-engine designers.

更新日期:2020-01-03

 

全部期刊列表>>
chemistry
物理学研究前沿热点精选期刊推荐
自然职位线上招聘会
欢迎报名注册2020量子在线大会
化学领域亟待解决的问题
材料学研究精选新
GIANT
ACS ES&T Engineering
ACS ES&T Water
ACS Publications填问卷
屿渡论文,编辑服务
阿拉丁试剂right
南昌大学
王辉
南方科技大学
彭小水
隐藏1h前已浏览文章
课题组网站
新版X-MOL期刊搜索和高级搜索功能介绍
ACS材料视界
天合科研
x-mol收录
赵延川
李霄羽
廖矿标
朱守非
试剂库存
down
wechat
bug