Invariant plastic deformation mechanism in paramagnetic nickel-iron alloys.

ABSTRACT: The Invar anomaly is one of the most fascinating phenomena observed in magnetically ordered materials. Invariant thermal expansion and elastic properties have attracted substantial scientific attention and led to important technological solutions. By studying planar faults in the high-temperature magnetically disordered state of [Formula: see text], here we disclose a completely different anomaly. An invariant plastic deformation mechanism is characterized by an unchanged stacking fault energy with temperature within wide concentration and temperature ranges. This anomaly emerges from the competing stability between the face-centered cubic and hexagonal close-packed structures and occurs in other paramagnetic or nonmagnetic systems whenever the structural balance exists. The present findin

SUBMITTER: Dong Z 

PROVIDER: S-EPMC8040816 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature