Abstract：
:The aim of the study was to investigate the effect of post-heat treatment on the microstructures and fatigue strengths of Co-Cr-Mo (CCM) clasps prepared by selective laser melting (SLM). Clasp specimens and rod-shaped specimens were fabricated by SLM using CCM powders with different angulations (0°, 45°, and 90°). Two heat treatment conditions were used: 1 and 6 h at 1150 °C in an argon atmosphere followed by cooling in a furnace. Subsequently, the fatigue strength and microstructure were investigated. The results revealed that for the control group, the mean fatigue life was different when building angulations were changed as manifested by the control-90 specimen, which exhibited the highest fatigue life, followed by control-45 and then control-0. One-hour heat treated samples showed higher fatigue strength in all axes than the 0°- and 45°-axes control samples and lower fatigue strength than the 90°-axes control samples. The survival rate after heat treatment for 1 h exhibited no significant difference in all the axes. In terms of microstructure, after heat treatment, the samples showed homogeneous equiaxed grain and randomized texture in all angulations. Therefore, using a post-heat treatment can reduce the anisotropy effect on the microstructure and fatigue strength due to homogenized microstructure.
journal_name
J Mech Behav Biomed Materauthors
Kittikundecha N,Kajima Y,Takaichi A,Wai Cho HH,Htat HL,Doi H,Takahashi H,Hanawa T,Wakabayashi Ndoi
10.1016/j.jmbbm.2019.06.010subject
Has Abstractpub_date
2019-10-01 00:00:00pages
79-89eissn
1751-6161issn
1878-0180pii
S1751-6161(19)30310-8journal_volume
98pub_type
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