Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 12, 2018 - March 13, 2018
Nanocrystalline nickel processed by electrodeposition was annealed at a various temperature to relax grain boundaries, and the mechanical properties were evaluated. The specimens annealed at 473 and 573 K for 0.5 h exhibited the higher hardness than the as-deposited specimen, but annealing at more than 673 K decreased the hardness. The increased hardness can be attributed to grain boundary relaxation strengthening by low-temperature annealing. As a result of tensile tests, annealing at 473 K increased strength, but decreased elongation to fracture. In contrast, the specimens annealed at 573 K showed higher strength and elongation to fracture than the as-deposited specimen.
