Grain Size Evaluation of Selectively Heated Sintered PM Preforms under Cold Compression

The mechanical qualities of the materials determine the final product’s performance in engineering applications, and the analysis of material grain size could change these attributes. Controlling grain size is critical in the metal forming process for obtaining good mechanical characteristics, which...

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Bibliographic Details
Published in:Journal of testing and evaluation 2024-01, Vol.52 (1), p.378-391
Main Authors: Ramakrishnan, Tharmaraj, Maharajan, Joseph Davidson
Format: Article
Language:English
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Summary:The mechanical qualities of the materials determine the final product’s performance in engineering applications, and the analysis of material grain size could change these attributes. Controlling grain size is critical in the metal forming process for obtaining good mechanical characteristics, which improves the final component’s performance. The purpose of this research is to determine the impact of selective heating (SH) on the microstructure of sintered powder metallurgy aluminum- and titanium-based preforms for various titanium weight fractions (2–6 %) and starting relative densities (80–90 %). Cold upsetting tests of sintered aluminum-titanium workpieces were carried out in a hydraulic press for several ranges of SH (100°C–250°C). The microstructure of aluminum-titanium specimens was examined using an optical microscope, and the intercept line approach was employed to calculate the average grain size (AGS). Because of dynamic recrystallization and grain development, the AGS of aluminum-titanium preforms is found to increase as the SH temperature rises.
ISSN:0090-3973
1945-7553
DOI:10.1520/JTE20230310