Anomalies in the curve of critical shear stress versus temperature for single crystals of certain iron-chromium-nickel alloys at low temperatures

1. In the case of single crystals of the metastable alloys 000Kh18N10 and 000Kh18N15, the curves of critical shear stress versus temperature show anomalies due to γ→ξ transformation. In 000Kh18N10 the γ−ξ transformation begins near 200°K as a result of cooling, whereas in 000Kh18N15, it begins near 77°K as a result of slight plastic deformation. 2. The decrease in critical shear stress in 000Kh18N10 begins at a higher temperature when the cooling rate is decreased.