Microtensile and Weibull analyses of direct metal laser sintered Ti–6Al–4V with process parameter induced defects

Abstract

Direct metal laser sintered Ti–6Al–4V samples, with intentionally induced defects generated by varying the process parameters, were analyzed using microtensile testing techniques. Samples with defects exhibited statistically-significant larger microtensile than macrotensile ultimate strengths. Weibull microtensile moduli are smaller than macrotensile moduli indicating greater variability. Comparing the microtensile results to macrotensile properties reveals how changing these process parameters affects the range of mechanical behaviors potentially present in additively-manufactured parts due to the varying microstructures in the material.

Keywords

• Laser sintering
• Porosity
• Titanium
• Mechanical properties
• Microtensile testing
• Weibull modulus