Determination of γ′+γ / γ Phase Boundary in Ni-Al-Cr System Using DTA Thermal Analysis

Archives of Metallurgy and Materials

K. Rzyman¹  T. Maciąg¹ 

[1] Silesian University of Technology, Faculty of Materials Engineering and Metallurgy, Institute of Metals Technology, 8 Krasinskiego Str., 40-019 Katowice, Poland

关键词: Keywords: DTA thermal analysis;    order-disorder transition;    Ni3Al;    Ni-Al-Cr;   

DOI  :  10.1515/amm-2016-0044

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

Mechanical properties at elevated temperature, in modern alloys based on intermetallic phase Ni3Al are connected with phase composition, especially with proportion of ordered phase γ′ (L12) and disordered phase γ (A1). In this paper, analysis of one key systems for mentioned alloys - Ni-Al-Cr, is presented. A series of alloys with chemical composition originated from Ni-rich part of Ni-Al-Cr system was prepared. DTA thermal analysis was performed on all samples. Based on shape of obtained curves, characteristic for continuous order-disorder transition, places of course of phase boundaries γ′+γ / γ were determined. Moreover, temperature of melting and freezing of alloys were obtained. Results of DTA analysis concerning phase boundary γ′+γ / γ indicated agreement with results obtained by authors using calorimetric solution method.

【 授权许可】

Unknown