Numerical simulation of inertia friction welding process of GH4169 alloy Zhang Liwen, Liu Chengdong, Qi Shaoan, Yu Yongsi, Zhu Wenhui, Qu Shen and Wang Jinghe J. Phys. IV France, 120 (2004) 681-687 DOI: 10.1051/jp4:2004120078