Research on billet optimization and forming influence rule of shaft forgingRanhao YIN, Dong LIU, Jingqing CHEN, Shun HAN, Chunxu WANG, Yong LI and Jianguo WANGJNWPU, 41 5 (2023) 1015-1023DOI: https://doi.org/10.1051/jnwpu/20234151015