Study of standard heat treatment on mechanical properties of Inconel 718 using ball indentation technique

2008 ◽  
Vol 62 (17-18) ◽  
pp. 2619-2622 ◽  
Author(s):  
Sabita Ghosh ◽  
Sandip Yadav ◽  
Goutam Das
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Inconel 718 ◽  
Standard Heat Treatment ◽  
Indentation Technique ◽  
Standard Heat ◽  
Ball Indentation

scholarly journals Analysis of Microstructure and Mechanical Properties in As-Built/As-Cast and Heat-Treated Conditions for IN718 Alloy Obtained by Selective Laser Melting and Investment Casting Processes

Crystals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1196
Author(s):  
Juan Carlos Pereira ◽  
Jon Aranzabe ◽  
Mari Carmen Taboada ◽  
Noelia Ruiz ◽  
Pedro Pablo Rodriguez
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Investment Casting ◽  
Dendritic Structure ◽  
Heat Treatments ◽  
Strengthening Mechanisms ◽  
Standard Heat Treatment ◽  
Homogeneous Microstructure ◽  
Standard Heat ◽  
Microstructure And Mechanical Properties

In this work, new customized heat treatments for selective laser melted (SLM) parts in IN718 alloy were analyzed. This was done through the evaluation of the mechanical properties and advanced characterization of the phases and microstructure obtained in as-built condition and after the application of standard and tailored heat treatments. The microstructure and mechanical properties were compared and discussed with results reported in the literature. Finally, strengthening mechanisms of IN718 alloy processed by SLM and its differences with mechanisms that occur in investment casting were analyzed. Both processes generate quite different microstructures, investment casting is composed mainly by a dendritic structure, and SLM is characterized by columnar and cellular structures with very thin cells. Due to the fine and homogeneous microstructure obtained from SLM processing and its specific strengthening mechanisms, it is not necessary to apply homogenization and solution stages as in standard heat treatment used for this type of alloy in casting or wrought. The pre-heating and process parameters selected, in combination with a direct stepped aging (at 720 °C/620 °C), provide the material with its best mechanical properties, which are superior to those obtained by standard heat treatment (AMS 5383F) applied to investment casting of IN718 alloy.

The Effect of Gallium on the Mechanical Properties of Superalloy K444

2012 ◽  
Vol 452-453 ◽  
pp. 31-34
Author(s):  
Xuan Xiao ◽  
Zeng Chao ◽  
Xu Le ◽  
Li Yuan Sheng ◽  
Yong An Guo ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Heat Treatment ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Room Temperature ◽  
Standard Heat Treatment ◽  
Standard Heat ◽  
Gallium Content ◽  
Scanning Electron

In order to figure out whether Gallium works in the superalloy K444, its composition had been modified by adding about 0.003 wt.% and 0.01 wt.% Ga, respectively. Mechanical properties of the modified superalloy K444 were investigated by using scanning electron microscopy (SEM) after standard heat treatment. Gallium had no significant effect on the tensile strength at room temperature and 900 °C. Gallium had a little effect on the tensile plasticity at room temperature and 900 °C. The plasticity is better in the modified K444 alloy containing 0.003wt. % Ga, however, the plasticity became worse in the alloy containing 0.01wt. % Ga. As for plasticity, the optimum Gallium content should be 0.003 wt. % for the superalloy K444.

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