Details

Autor(en) / Beteiligte

• Hu, T.
• Wen, C.S.
• Sun, G.Y.
• Wu, S.L.
• Chu, C.L.
• Wu, Z.W.
• Li, G.Y.
• Lu, J.
• Yeung, K.W.K.
• Chu, Paul K.

Titel

Wear resistance of NiTi alloy after surface mechanical attrition treatment

Ist Teil von

• Surface & coatings technology, 2010-10, Vol.205 (2), p.506-510

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2010

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• An ultrafine grain layer consisting of nanocrystallites as well as submicrometer grains is produced on NiTi shape memory alloy by surface mechanical attrition treatment (SMAT) and the effects of the ultrafine grain layer on the tribological properties are investigated under dry sliding conditions. Compared to the coarse grain (CG) NiTi, the SMAT NiTi has smaller friction coefficients and improved wear resistance at applied loads from 5 to 15 N due to the grain refinement effect. Examination of the worn surfaces indicates that materials delamination and particles co-exist on both the CG and SMAT NiTi samples. Our results indicate that delamination is the main wear mechanism on CG NiTi whereas abrasive particles dominate the wear process on SMAT NiTi.