Nickel base single crystal superalloys with higher volume fraction of γˊ are known to be severely susceptible to hydrogen embrittlement. Hydrogen is found to increase the slip planarity, accumulate dislocations in γ channels causing a macroscopic fracture along {001} γ/γˊ interface [1]. There is long standing enigma on the exact reason behind this γ/γˊ interfacial failure. Few theoretical...
Hydrogen as the lightest element and the smallest atom in the periodic table tends to diffuse fast with the capability to re-distribute quickly and penetrate almost all materials. Understanding the interactions of hydrogen with host materials is of great interest for many applications, from hydrogen storage and green energy applications to hydrogen embrittlement. We use atom probe tomography...
Abstract: Environmentally assisted embrittlement of high-strength Al alloys hinders their wide applications. The important role of hydrogen (H) associated with the H “embrittlement” mechanism occurs. However, the challenge of assessing the precise trapping sites of H makes the mechanisms remain ambiguous. In this presentation, I discuss the findings on H associated with specific...
