Research on Forming Quality of GH4169 Superalloy Multi-Step Hollow Turbine Shaft by Three-roll Skew Rolling - Si-Yuan Chen; Xue-Dao Shu; Yong-Ming Xu; Qian Chen; Hai-Jie Xu; Bao-Shou Sun; Ying Wang; Yi-Min Deng (Journal of Modern Mechanical Engineering and Technology, 2025)