EFFECT OF TREATMENT SOLUTION ON THE MICROSTRUCTURE AND MICROHARDNESS OF TERNARY Ni-Al-Nb ALLOY DOPED WITH TITANIUM

Hikmat Nugraha; Pradoto Ambardi; Djoko Hadi Prajitno

doi:10.17146/jsmi.2020.22.1.5526

EFFECT OF TREATMENT SOLUTION ON THE MICROSTRUCTURE AND MICROHARDNESS OF TERNARY Ni-Al-Nb ALLOY DOPED WITH TITANIUM

Hikmat Nugraha⁽¹⁾, Pradoto Ambardi⁽²⁾, Djoko Hadi Prajitno⁽³⁾,

(1) Department of Metallurgical Engineering, University of Jenderal Achmad Yani Bandung, Bandung 40284,Indonesia
(2) Department of Metallurgical Engineering, University of Jenderal Achmad Yani Bandung, Bandung 40284,Indonesia
(3) National Nuclear Energy Agency, Bandung 40132,Indonesia

Corresponding Author

Abstract

EFFECT OF TREATMENT SOLUTION ON THE MICROSTRUCTURE AND MICROHARDNES OF TERNARY Ni-Al-Nb ALLOY DOPED WITH TITANIUM. Nickel-based superalloys have been widely used in various applications, which require high strength at high temperatures. Most types of these superalloys is age-hardenable because they have γ’ particles' chemical composition Ni3(Al, Ti) in γ’-phase matrix. This research will be used alloy Ni-Al-Nb added alloying elements Ti. This research was conducted to study the mechanical properties, microstructure conditions in some alloys Ni-Al-Nb added distinction Titanium element (0,5% and 1% Ti) using the method of aging temperature variation performed at a temperature of 650 °C,700 °C and 750 °C with a holding time 4 hours and air cooling. Tests were conducted to determine the characterization of the specimen includes testing metallographic optical microscope, Rockwell hardness C and SEM- EDS,XRD. Results obtained from this research that addition of titanium element affecting the hardness values as well as the results of the cast, solution treatment and aging process results. The 1% Titanium content can affect the gamma prime coarsening and make the grain on the microstructure result smooth.