M. Al Bawaneh, J. Brewer, R. Hedrick, Ducommun AeroStructures Incorporated, Parsons, KS
Super plastic forming (SPF) experiments on Ti-6AL-4V are being carried out at elevated temperatures ranging from 1600 oF to 1700 oF under different process parameters. The key process input parameters of the experiments under investigation are starting material thickness, forming time and pressure. The effects of these parameters on grain size, hydrogen content, alpha case, ultimate tensile strength, yield strength and elongation are the focus of this study.
Summary: Super plastic forming (SPF) experiments on Ti-6AL-4V are being carried out at elevated temperatures ranging from 1600 oF to 1700 oF under different process parameters. The initial results show that the key process input parameters (starting material thickness, forming time and pressure) do not have not significant effects on grain size, ultimate tensile and yield strength of the material. On the contrary, it is found that these parameters may have significant impact on the alpha case and hydrogen content. Moreover, the initial results suggest that there might be a strong correlation between alpha case and hydrogen content of SPF Ti-6AL-4V.
