Vibratory bending fatigue behavior of titanium 6Al–4V plate specimens manufactured via direct metal laser sintering (DMLS), powder bed fusion additive manufacturing (AM), is assessed. Motivation for the work is based on unprecedented performance demands for sixth-generation gas turbine engine technology that requires complex, lightweight components. Due to cost, schedule, and feasibility limitations associated with conventional manufacturing, AM aims to address ubiquitous component concepts. Though AM has promise in the engine community, process controls necessary for consistent material properties remain an enigma. The following manuscript compares variability of DMLS fatigue and strength to cold-rolled data. Results show discrepancies between DMLS and cold-rolled for fatigue and microstructure characteristics.
Fatigue and Strength Studies of Titanium 6Al–4V Fabricated by Direct Metal Laser Sintering
Contributed by the Manufacturing Materials and Metallurgy Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received July 14, 2015; final manuscript received July 27, 2015; published online September 1, 2015. Editor: David Wisler. This material is declared a work of the U.S. Government and is not subject to copyright protection in the United States. Approved for public release; distribution is unlimited.
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Scott-Emuakpor, O., Holycross, C., George, T., Knapp, K., and Beck, J. (September 1, 2015). "Fatigue and Strength Studies of Titanium 6Al–4V Fabricated by Direct Metal Laser Sintering." ASME. J. Eng. Gas Turbines Power. February 2016; 138(2): 022101. https://doi.org/10.1115/1.4031271
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