Wear Behaviour of NiTi SMA Fabricated by P/M: A Taguchi Approach

Abstract

The size of equipments now a day reduced to microns and nanos. So, the wear characteristics play a dominating role in the proper working of equipments utilized in engineering and medical fields. NiTi alloys have different applications in medical and engineering field due to their unique characteristics of super-elasticity, corrosion resistance, shape memory and bio-compatibility. In the present research, Ni50Ti50 alloy have been fabricated by powder metallurgy method with polypropylene as a binder. During sintering process at 1150°C, organic binder evaporates and makes the alloy porous. The surface of NiTi alloy is covered by TiO2 layer, which increases its wear resistance, but with the increase of frictional heat (produced due to pin on disc apparatus experimentation) this layer, breaks and wear rate increases. The mean value of wear loss was investigated at 95% of confidence level and further experiments were performed to validate the predicted value.

Effect of Bisphenol-A Exposure on Activity of Antioxidant Enzymes in Channa punctatus and Alleviation with Vitamin C

“…Fish are highly suited for toxicological studies because they are exposed to the toxicant through their entire body and can be easily cultured in the laboratory to study the effect of any particular toxicant. Channa punctatus, the snake headed murrel, is a hardy fish and a popular model organism for toxicological studies (Yadav and Trivedi, 2009;Sharma et al, 2019). In this study we investigated the effect of BPA on the activity of liver antioxidant enzymes and the ameliorative effect of co-exposure to vitamin C.…”

Development of Porous Ni40Ti50Cu10 Using Taguchi Approach

“…Other responsive parameters are also evaluated by Tadesse et al (2009). In published work, mostly the researches (Sharma et al, 2016;2017a;2017b;2017c) are done on the characteristic evaluation of NiTi alloy, but a limited work was observed on the effect of ternary elements. Also, the influence of process parameters on the responses are still underway (Gialanella et al, 2008;Sharma et al, 2018c;2018d;Soni et al, 2019).…”