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The Characteristics of Unidirectional Solidified Ni-Al-Mo Alloys = Charakterisierung von unidirektional erstarrten Ni-Al-Mo Legierungen

M., Ishak and Takagi, H. (2012) The Characteristics of Unidirectional Solidified Ni-Al-Mo Alloys = Charakterisierung von unidirektional erstarrten Ni-Al-Mo Legierungen. Materialwissenschaft und Werkstofftechnik = Materials Science and Engineering Technology, 43 (5). pp. 416-420. ISSN 0933-5137

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Abstract

The material composite was fabricated by the unidirectional solidification method in the eutectic composition alloy. Performing unidirectional solidification of Ni-Al-Mo alloy in eutectic composition produces γ phase -Ni and γ′ phase-Ni3Al as a matrix, and the phase-Mo growth into fibrous and lamellar-like structure. The aim of this research was to study the characteristics of Ni-Al-Mo after various heat treatment conditions. The specimens were solution-treated at temperatures of 1180°C and 1280°C, followed by water quenching. In addition, aging treatments were carried out at various temperatures (from 700°C to 1000°C) and at different time durations. The microstructure, mechanical properties and characteristics of non-treated, solution-treated and aging specimens were investigated. It was found that the mechanical properties of unidirectional solidified Ni-Al-Mo can be improved by solution treatment whilst the strength through performing an aging treatment. The optimized conditions were at 1280°C and 4 hours for water quenching (solution treatment), followed by an aging process at 800°C and 4 hours. These treatments led to an increase of mechanical properties due to uniformly precipitations of finely dispersed γ′ phase-Ni3Al throughout the specimens.

Item Type: Article
Additional Information: Please click to official URL
Uncontrolled Keywords: Ni-Al-Mo; Casting; Heat treatment; MMC = Ni-Al-Mo; Gießen; Wärmebehandlung; MMC
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Faculty of Mechanical Engineering
Depositing User: Noorul Farina Arifin
Date Deposited: 15 Aug 2013 04:43
Last Modified: 15 Dec 2016 03:15
URI: http://umpir.ump.edu.my/id/eprint/3861
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