Impact of Microstructural Phase Percentages Quantified Using KNN Algorithm on Torsional Strength and Microhardness of AISI 4140 Heat-Treated Steel - Ibrahim, Zainab A.; Saleh, Nathera A.; Jabbar, Murtadha A. (Metallography, Microstructure, and Analysis: Application and Innovation for Metals, Alloys, and Engineered Materials, 2025)