Abstract
The effects of cold rolling, solid solution, aging and annealing treatment on Pt-0.7Ti microalloy were investigated in this study. The microstructures of Pt-0.7Ti microalloy and the precipitated ordered phase Pt8Ti were observed and analyzed by OM, TEM, XRD. The mechanical properties of the alloy were evaluated Vicker micro-hardness. The results showed that micro amount of Ti was an effective element for solid-solution strengthening of Pt, the micro-hardness of 97% deformation for ST and ST+AG samples increased to 214HVand 224HV, respectively, which almost are double that of pure Pt. Micro-amount of long range ordered phase Pt8Ti was precipitated during the heat treatment, but the effect of order hardening in Pt-0.7Ti microalloy was not obvious. The microhardness by large rolling deformation for quenched samples almost unchanged after an annealing below 500°C for 1h, but decreased significantly at 700°C, and the recrystallization temperature was risen by 200°C than that of pure Pt.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference20 articles.
1. M. Cavero. The Structural and Mechanical Properties of the Pt-Ti and Ir-Ti Systems, D. University of KwaZulu-Natal Pietermaritzburg, (2011).
2. L.A. Cornish, L.H. Chown. Platinum-Based Alloys and Coatings: Materials for the Future? Advances in Gas Turbine Technology, edited by Dr. Ernesto Benini InTech Publising, Europe, (2011)337-371.
3. Z.M. Rdzawski, J.P. Stobrawa. Microstructure and properties of the new Pt-Rh based alloys for high-temperature applications, Materials Processing Technology. 153–154(2004) 681-687.
4. L.A. Cornish, R. Süss, A. Douglas, L.H. Chown, L. Glaner. The Platinum Development Initiative: Platinum-Based Alloys for High Temperature and Special Applications: Part Ⅰ , Platinum Metals Rev. 53(2009) 2-10.
5. L.A. Cornish, R. Süss, L.H. Chown, S. Taylor, L. Glaner, Platinum-based alloys for high temperature and special applications, A. Douglas S.N. Prins: International Platinum Conference Platinum Adding Value, (2004) 329-336.