Zobrazeno 1 - 10
of 67
pro vyhledávání: '"David S. Grummon"'
Publikováno v:
Journal of Materials Science. 47:2088-2094
An indentation-planarization method for NiTi shape memory alloys has been developed that produces a robust surface topographical memory effect that we call "surface form memory", or SFM. Surface form memory entails reversible transitions between one
Publikováno v:
Journal of Materials Science. 46:7401-7409
Indentation-induced two-way shape memory leads to pronounced temperature dependence of the depth of spherical indents made in martensitic NiTi shape-memory alloys. They are shallower when austenitic, and depth varies during both M → A and A → M t
Publikováno v:
Journal of Materials Engineering and Performance. 18:538-542
Spherical indentation of NiTi shape memory alloys (SMA) to depths greater than about 3% of the indenter radius results in two-way shape-memory training in a deformation zone beneath the indent. If deep spherical or cylindrical indents are subsequentl
Publikováno v:
Journal of Materials Research. 22:2851-2855
Spherical indents in NiTi shape memory alloys can have reversible depth change: deeper depth in the martensitic phase at low temperature and shallower depth in the austenitic phase at high temperature. This is the indentation-induced two-way shape me
Publikováno v:
Smart Materials and Structures. 16:S170-S178
In this paper we demonstrate a new class of superelastic NiTi honeycomb structures. We have developed a novel brazing technique that has allowed us to fabricate Nitinol-based cellular structures with relative densities near 5%. Commercially available
Publikováno v:
Materials Science and Engineering: A. :1113-1118
A novel metal-joining process is described that exploits interfacial reactions between nitinol and pure niobium to produce a reactive eutectic liquid that readily creates a robust metallurgical bond between nitinol and itself. With this new reactive-
Publikováno v:
Materials Science and Engineering: A. :710-713
The tribological performance of hard-coatings such as chromium nitride depends intimately on the mechanical properties of the support structure beneath the coating. For soft substrates, poor support characteristics severely degrade hard coating perfo
Wear resistant self-healing tribological surfaces by using hard coatings on NiTi shape memory alloys
Publikováno v:
Surface and Coatings Technology. 201:1053-1057
Shape memory materials are among several smart materials being investigated for a wide range of applications, including “self-healing” tribological surfaces. Although shape memory alloys have recently been demonstrated as self-healing tribologica
Autor:
Anita M. Weiner, Yang-Tse Cheng, Lenoid C. Lev, David S. Grummon, Michael J. Lukitsch, Wangyang Ni
Publikováno v:
Wear. 259:842-848
This paper presents a study on using the superelastic NiTi alloy as an interlayer between CrN coating and aluminum substrate to improve the interface adhesion and wear resistance. Nanoindentation, scratch adhesion, and pin-on-disk wear measurements w
Publikováno v:
Philosophical Magazine. 85:577-587
Irradiation-induced transformations in sputter-deposited Ti-rich NiTi thin films have been investigated with special attention given to the effects of prior deformation on the response of martensite phase. Irradiation at low fluence was carried out a