Optimization of Composition and Heat Treatment of Age-Hardened Pt-Al-Cr-Ni Alloys
نویسندگان
چکیده
GRATZEL and R. VÖLKL, Metall. Mater. Trans., 2005, 36A, 681–689 Pt-base alloys (1) with various contents of Al, Cr and Ni were arc melted. Solution heat treatments at 1450oC followed by water quenching gave single phase alloys. Ageing at 1000oC caused the precipitation of L12 ordered particles. (1), comprising (in at.%): 11 Al; 3 Cr; 6 Ni and balance Pt, had cuboidal precipitates with edge lengths of 200 to 500 nm along with a volume fraction of 23% and a lattice misfit of –0.1%. Ageing at 1100oC coarsened the precipitates.
منابع مشابه
Tie-Line Compositions of the and ( ; ) Phases in the Re-Cr-Ni System at 1573K*
Compositions with tie lines between the and ( ; ) phases in a ternary Re-Cr-Ni system were investigated by heat treating various ternary Re-Cr-Ni alloys at 1573K in vacuum for up to 2000 h. The microstructures of the Re-containing alloys that had been water quenched after various heat treatment for times were observed and their concentration profiles for Re, Cr, and Ni were measured using an el...
متن کاملEffects of Various Ageing Heat Treatments on Microstructural Features and Hardness of Piston Aluminum Alloy
Piston aluminum alloys have different intermetallic phases, such as Cu3Al, Mg2Si ,and AlNi phases. The morphology and the distribution of such phases have important roles on mechanical properties of the piston material. Therefore, in this research, various ageing heat treatments on the mentioned material were done and the microstructural feature and the hardness were studi...
متن کاملThe Effect of Nickel Increasing and Aluminum Addition on Sulfidation Resistance of Fe-Ni-Cr Alloys (TECHNICAL NOTE)
In this research the effects of; increasing the amount of nickel and adding aluminum to create and prolong sulfidation resistance of Fe-Ni-Cr alloys have been investigated. Sulfidation tests were carried out at 1100°C in S/O bearing atmosphere. Prior to the tests, the specimens were annealed in argon at 1250°C for 8 hrs. Weight changes were measured and corroded deposits were analyzed byscannin...
متن کاملEffect of heat treatment on structure and properties of multilayer Zn-Ni alloy coatings
Composition modulated multilayer alloy (CMMA) coatings of Zn-Ni were electrodeposited galvanostatically on mild steel (MS) for enhanced corrosion protection using single bath technique. Successive layers of Zn-Ni alloys, having alternately different composition were obtained in nanometer scale by making the cathode current to cycle between two values, called cyclic cathode current densities (CC...
متن کاملبررسی و مقایسه زیستسازگاری آلیاژ مینالوکس و آلیاژ مشابه خارجی (In-vitro)
Statement of Problem: One of newly presented base metal alloys (Minalux) is produced according to VeraBond2 alloy (Ni- Cr base) composition. Several studies showed that, cytotoxicity of base metal alloys can be occurred due to corrosion and element release. Purpose: This study evaluated the biocompatibility of these two base metal alloys in three steps: as cast, after polishing and after porcel...
متن کامل