Heat Treatments Effects on NickeI-Based Superalloy Inconel 713C

Abstract

The purpose of this work is to study the effect of heat treatments on the microstructure of the nickel-based superalloy Inconel 713C. Three different conditions were studied and the results compared: (1) as cast; (2) solution treatment (1,179°C/2h) and (3) stabilizing treatment (1,179°C/2h plus 926°C/16h). Inconel 713C is normally used in the as-cast condition, an improvement in the 980°C stress-rupture life is often obtained by a solution heat treatment. However, the material in this condition tested under high stress at 730°C shows a marked decreased in rupture life and ductility [1]. The mechanical resistance in creep increases in Inconel 713C by precipitation hardening phase, such γ’ (Ni3Al) formed during the heat treatments [2]. The characterization techniques used was: chemical analysis, hardness test, X-ray diffraction, optical microscope and scanning electron microscopy (SEM), EDS analyzes and thermocalculation. The heat treatments modified the dendritic structure, reducing the acicularity. The SEM and EDS analysis illustrated the γ, γ’ and carbides. The matrix phase (γ), has in its constitution the precipitation of the γ’ phase, in a cubic form, and in some regions, veins of carbides were modified with the heat treatments.

Powder injection moulding of Inconel 713C alloy

“…As shown in Figure 7(e), the grains grow when the holding time extends longer and the least quantity of pores could be gained when sintered at 1300°C for 3 h. Table 4 indicates that the sintered samples’ mechanical properties are in a close relation with the density of the alloy. The hardness of IN713C prepared by this process is higher than that of the cast IN713C [17].…”

Artificial intelligence inspired design of non-isothermal aging for γ–γ′ two-phase, Ni–Al alloys

“…Though the first “superalloys” started to appear in the 1940s and modern superalloys were developed in the 1980s 4 , 5 . The optimized chemistries for specific properties of alloy design 6 , metalworking, and heat treatment formulations 7 – 11 are still hot topics in the research community. The influence of heat treatment at different temperatures on mechanical properties has been the focus of extensive research and is well documented 12 – 16 .…”

Artificial Intelligence Inspired Design of Non-Isothermal Aging for γ - γ' Two- phase, Ni-Al Alloys

“…Though the first "superalloys" started to appear in the 1940s and modern superalloys were developed in the 1980s 4,5 . The optimized chemistries for specific properties of alloy design 6 , metalworking, and heat treatment formulations [7][8][9][10][11] are still hot topics in the research community. The influence of heat treatment at different temperatures on mechanical properties has been the focus of extensive research and is well documented [12][13][14][15][16] .…”