Investigation of Microstructure, Residual Stress, and Hardness of Ti-6Al-4V after Plasma Nitriding Process with Different Times and Temperatures. - Ongtrakulkij, Goratouch; Kajornchaiyakul, Julathep; Kondoh, Katsuyoshi; Khantachawana, Anak (Coatings (2079-6412), 2022)