In the present study, rolling-sliding contact fatigue (RSCF) failures of AISI 9310 gear steel were analyzed systematically, in terms of characterizing the fatigue life, evolution of microstructure and crystallographic orientation, and variation of microhardness and residual stress distributions. The RSCF experiments were conducted using a twin rollers fatigue test rig. The RSCF life of AISI 9310 steel roller decreased continuously with increasing the maximum Hertzian contact pressure, however, it could be effectively improved by additional shot peening process owing to the enhanced microhardness and compressive residual stress near the roller surface. The main fatigue damage characteristics near the roller surface were consisted of inclined cracks, micropitting, spallation and plastic deformation. Although the compressive residual stress was reduced by RSCF, there was an obvious increase in the microhardness which should be attributed to the refined microstructure, increased dislocatio
May 27, 2021
The Cornell China Center (CCC) has announced six new grant awards, totaling $140,000, to support research by Cornell faculty teams partnering with researchers in China.
Focused on building solutions to meet the United Nations’ sustainable development goals for China and the world, the 2021 awards include four joint seed fund grants to expand collaborations between Cornell researchers and counterparts at Zhejiang University in Hangzhou and two China Innovation Grants.
CCC-funded research thrived in the past year, despite the COVID-19 crisis and logistical challenges the far-flung teams faced – from international travel bans to the 12-hour time difference. The center made 13 awards in 2020, including joint seed funding to five Cornell teams partnering with Shanghai Jiao Tong University.