Mohd Lutfi, Nordin (2010) Study The Effect Of Heat Treatment Temperature And Time On Carbide Formation And Hardness Variation Of Deposited Nickel Based Alloy. Project Report. UTeM, Melaka, Malaysia. (Submitted)
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Abstract
The microstructure of two different types of the nickel-based superalloy Waspaloy were characterized. One alloy was in the as-received condition whilts the other processed by Shaped Metal Deposition using Tungsten Heat source welding manipulator under argon. In this study, the effects of heat treatment temperature and time on carbide formation and hardness variations on the two Waspaloy samples were investigated; using optical microscopy technique and hardness test. The samples were than subjected to X-Ray diffraction analysis. It was found that Waspaloy consists of y matrix, y precipitates and carbide particle. The XRD analysis displayed a presence of carbide and austenitic phase in the as-received Waspaloy and deposited Waspaloy, indicating that the particles are possibly MC carbides and M23C6 carbide. Following solution treatment process, the as-received and deposited waspaloy had lower hardness and strength when compared to solution treatment and ageing process. The ageing process for 16 and 30 hours dramatically increase the strength of the as-deposited samples. For instance, from the initial hardness of 295 kgfmm-2 to 433 kgfmm-2 The results show that the optimum temperature and time for heat treatment is similar to the standard heat treatment of the wrought Waspaloy which is solution treatment at 1080 0C for 4 hours/air cooling, followed by stabilization at 845 0C for 4hour/ac and to aging at 760 oc for 16 hour/ac.
| Item Type: | Final Year Project (Project Report) |
|---|---|
| Uncontrolled Keywords: | Metals -- Heat treatment Nickel alloys -- Testing Nickel alloys -- Mechanical properties |
| Subjects: | T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Library > Final Year Project > FKP |
| Depositing User: | Ahmad Abu Bakar |
| Date Deposited: | 27 Apr 2012 07:18 |
| Last Modified: | 28 May 2015 02:30 |
| URI: | http://digitalcollection.utem.edu.my/id/eprint/2733 |
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