定向凝固高温合金DZ125L的变形和再结晶

Investigation of Deformation and Recrystallization in a Directionally Solidified Superalloy

通过电子背散射衍射(EBSD)等手段研究了定向凝固高温合金DZ125L压痕变形后的应变分布和热处理后的再结晶。结果表明:压痕截面的应变分布非常不均匀。压痕变形区域随着载荷的增加而增大,导致再结晶区域的增大。根据实验确定的某一温度下再结晶的临界变形量,结合压痕截面应变分布情况,可预测不同载荷对应的再结晶深度。

Distribution of strain and subsequent recrystallization （RX） around indentation in a directionally solidified superalloy DZ125L have been investigated by electron back scatter diffraction （EBSD） and other experimental method. The results show that distribution of strain was extremely homogenous. Deformed area increased with increasing of the load, which resulted in the larger region of RX. According to the distribution of strain on the section of indentation and the critical strain of RX at a certain temperature tested by experiment, RX depth with different load at this temperature can be forecasted.