A hetero-grained L12-strengthened high-entropy alloy with remarkable resistance against intermediate-temperature intergranular embrittlement and thermal instability. - Hou, Jinxiong; Qiu, Shi; Liu, Shaofei; Cao, Boxuan; Zhao, Yilu; Luan, Junhua; Wang, Tao; Jiao, Zengbao; Yang, Tao (Acta Materialia, 2026)