TENSILE DEFORMATION OF QUENCHED AND PARTITIONED STEEL - A THIRD GENERATION HIGH STRENGTH STEEL

摘要

In order to meet continually increasing vehicle safety and fuel economy requirements, automakers have responded by incorporating advanced high strength steels (AHSS) into vehicle designs. A recent addition to the AHSS family is produced with "quenching and partitioning" or "Q&P," a special heat treatment process. This promotes carbon enrichment of retained austenite, thereby enhancing ductility without substantially compromising strength. In this article, the quasi-static, room-temperature tensile deformation of a Q&P steel is investigated and compared to available grades of AHSS using stereo digital image correlation (DIC) for strain measurement.