ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The near-equiatomic TiNi alloy has been demonstrated to possess high wear resistance,which largely benefits from its pseudoelasticity (PE). However, the PE occurs only in a smalltemperature range, which makes the wear resistance of this alloy unstable as temperature changes,caused by environmental instability or frictional heating. Therefore, enlarging the workingtemperature of PE could considerably improve this alloy as a novel wear-resistant material.One possible approach is to develop a self-built temperature-dependent internal stress field bytaking the advance of the difference in thermal expansion between the pseudoelastic matrix and areinforcing phase. Such a T-dependent internal stress could adjust the martensitic transformationtemperature to respond changes in environmental temperature so that the temperature range of PEcould be enlarged, thus leading to a wide temperature range in which the minimum wear loss isretained.Research was conducted to investigate effects of an added second phase having a negativethermal expansion (NTE) coefficient on the wear resistance of a near-equiatomic TiNi alloy. Itwas demonstrated that the temperature range of this modified material in which the wear lossdropped was enlarged. In addition, the wear resistance of such a TiNi-matrix composite was onone order of magnitude higher than that of unmodified TiNi alloy
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.3261.pdf
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