Accelerated exploration of TRIP metallic glass composite by laser additive manufacturing

• 作者: Zejiang Yu Wei Zheng Zhiqiang Li Yunzhuo Lu Xinbing Yun Zuoxiang Qin Xing Lu
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2021,（19）
• 页码范围: 68-73
• 页数: 6页
• 语种: 英文

摘要

Introducing transformation-induced plasticity(TRIP)effect into bulk metallic glass composites(BMGCs)is an effective route to improve their ductility and strain-hardening ability.Since the morphology and structure of the crystalline austenite phases responsible for the TRIP phenomenon are strongly depen-dent on the alloy composition and cooling rate during freezing,distinguishing the optimal cases from a vast variety of candidates is the primary task of exploring TRIP BMGCs.However,without a suitable theoretical guidance,the exploration of BMGCs is usually performed via the traditional trial-and-error route,making the BMGC development extremely time consuming and labor intensive.Here,we present a novel high-throughput strategy to accelerate the exploration process of TRIP BMGCs.The efficiency of this strategy was demonstrated on a well-studied Cu-Zr-Al alloy system.A screening library,comprised by 121 cylindrical samples with different conditions,was rapidly prepared by laser additive manufacturing(LAM).The phases of the library were efficiently identified by micro-area X-ray diffraction(M-XRD)to screen the optimal compositions and cooling rates that precipitate only B2-CuZr phase.The distribution uniformity of the B2-CuZr phase was further evaluated based on digital image processing technology to screen the candidates of better ductility.The high-throughput results are in good agreement with the pre-vious casting investigations of discrete samples,confirming the validity of the present high-throughput strategy.