Figure 3: TTT diagrams for embrittlement.
From: Critical fictive temperature for plasticity in metallic glasses
The Tfc is the highest temperature where embrittlement can occur owing to structural relaxation. Above Tfc, the embrittlement time increases abruptly because of change in origin of embrittlement from structural relaxation to crystallization. The time (te) at Tfc defines the nose of TTT diagrams for embrittlement. The measured te is 5,000 s for Zr-BMG (a) and 50 s for Pd-BMG (b).
