A study on heat affected zone softening in resistance spot welded dual phase steel by nanoindentation Baltazar Hernandez, Victor Hugo ; Panda, Sushanta Kumar ; Okita, Yasuaki ; Zhou, Norman Y. Abstract Publication: Journal of Materials Science Pub Date: March 2010 DOI: 10.1007/s10853-009-4141-0 Bibcode: 2010JMatS..45.1638B