*3.2. Studies of Grain Coarsening during Reheating*

In order to quantify austenite grain size as a function of reheating temperature, grain coarsening experiments were conducted using isothermal holding at various reheating temperatures using cube samples having dimensions of 12 mm on a side. Prior to each soaking, samples were encapsulated in evacuated quartz tubes and filled with pure argon to minimize any oxidation effects. Samples were placed in a box furnace and were soaked for 60 min at different temperatures starting from 900 ◦C to 1300 ◦C in increments of 50 ◦C. Following that, the capsules were broken and the samples were quenched in water.
