Nano-mechanical Behavior of H13 Tool Steel Fabricated by a Selective Laser Melting Method

Abstract

Nano-mechanical properties of selective laser melted H13 steel at a scan laser speed of 100 mm/s were investigated using nanoindentation tests. The findings shed light on the interrelationship between the nanoindentation strain rate and hardness. It was found that the strain-rate sensitivity exponent (m = 0.022) of this material indicated that the nanoindentation hardness increased in a range of (8.41 to 9.18) GPa with an increase in the strain rate ranging from 0.002 to 0.1 s−1.