A study of grain boundary segregants in thermally embrittled maraging steel
Auger electron spectroscopy was employed to directly determine the cause of thermal embrittlement of 250 series maraging steel. A drop in CVN energy with introduction of an embrittling intermediate anneal was directly correlated with a build-up of both Ti and C on the prior austenite grain boundaries. By following grain boundary concentration of Ti as a function of time at a given temperature, the diffusion coefficient for Ti in the maraging steel at 1600°F was determined. Finally, the further drastic drop in CVN energy on aging an embrittled specimen was shown to be due to a segregation of B to the already embrittled prior austenite grain boundaries, causing a further loss of cohesion. © 1974 American Society for Metals, The Melallurgical Society of AIME.
A study of grain boundary segregants in thermally embrittled maraging steel.
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/4396