Analysis of the extent of interphase precipitation in V-HSLA steels through in-situ characterization of the gamma/alpha transformation

作者：Clark Samuel^*; Janik Vit; Rijkenberg Arjan; Sridhar Seetharaman

来源：Materials Characterization, 2016, 115: 83-89.

DOI：10.1016/j.matchar.2016.03.021

• In-situ-EBSD
• In-situ-HT-CLSM
• Interphase Precipitation
• Orientation Relationships

In-situ characterization techniques have been applied to elucidate the influence of gamma/alpha transformation upon the extent of interphase precipitation in a low-carbon, vanadium-HSLA steel. Electron Back-scattered diffraction analyses of the gamma/alpha orientation relationship with continuous cooling at 2 and 10 K/s suggest that the proportion of ferrite likely to hold interphase precipitation varies little with cooling rate. However, TEM analyses show that the interphase precipitation refines with increasing cooling rate in this cooling range. With cooling rates in excess of 20 K/s, interphase precipitation is increasingly suppressed due to the increasingly diffusional-displacive nature of the Widmanstatten gamma/alpha transformation that is activated. The present study illustrates that the extent and dimensions of interphase precipitation can be controlled through controlled cooling.

• 出版日期2016-5