Effective Duration of Gas Nitriding Process on AISI 316L for the Formation of a Desired Thickness of Surface Nitrided LayerHassan R. S. Mahmoud, Syafiq A. Yusoff, Azman Zainuddin, Patthi Hussain, Mokhtar Ismail and Kamal AbidinMATEC Web of Conferences, 13 (2014) 04021DOI: https://doi.org/10.1051/matecconf/20141304021