Abstract
The surface behavior of the NiTi coating has been studied by composition analysis, microstructure, and interface diffusion. The shape memory effect was investigated by thermal recovery of the indented surface at various loads. Near the theoretical density (99.3%), high Vickers hardness 244–310 HV, was measured by applying various loads of 1961–98 mN for NiTi samples separated from graphite substrate. However, samples prepared from stainless steel substrate display more homogenous hardness at various loads from 214 to 238 HV with applied load from 98 to 490 mN. Phase transformation temperatures indicated that above 105 °C, the alloy transforms and is saturated in the austenite stage. Both samples exhibited a hysteresis effect of shape memory effect on bending mode in thermal cycles. Both samples were indented at various loads from 98 to 1961 mN load for 10 s, and residual indent points are imaged. Recovery in the depth of indent points was analyzed after heating samples above austenite finish temperature at 150 °C for 10 min. A maximum recovery of 77% is achieved in the sample retrieved from stainless steel substrate at 245 mN load.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
