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Instrumented impact tests on miniaturized Charpy specimens of additively manufactured (AM) Ti6Al4V



Enrico Lucon, Nikolas W. Hrabe


An investigation on the impact toughness properties of wrought and additively-manufactured (AM) Ti-6Al-4V was conducted at NIST Boulder, by means of instrumented impact tests on miniaturized Charpy specimens. Full transition curves for absorbed energy and lateral expansion were obtained by performing tests in the temperature range between -196 °C and 700 °C. The effect of various parameters was investigated for AM specimens, namely specimen orientation, Hot Isostatic Pressing (HIPping), notch configuration (printed or machined). Our results indicate that AM specimens exhibit equivalent or better impact toughness than wrought material after HIPping, and that the vertical orientation is tougher than the horizontal direction. HIPping has a significant beneficial effect for the AM material, while no effect of notch configuration was observed from the results obtained. Characteristic instrumented forces allow a qualitative assessment of dynamic tensile properties, which appear to be similar for wrought and AM Ti-6Al- 4V.
Technical Note (NIST TN) - 1936
Report Number


Additive manufacturing, Hot Isostatic Pressing, impact toughness, instrumented Charpy tests, miniaturized Charpy specimens, Ti-6Al-4V


Lucon, E. and Hrabe, N. (2016), Instrumented impact tests on miniaturized Charpy specimens of additively manufactured (AM) Ti6Al4V, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed July 13, 2024)


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Created September 29, 2016, Updated November 10, 2018