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最近,中国科学院力学研究所纳米金属力学行为课题组与美国北卡州立大学的科研人员合作,在金属钛中研制出一种新的微观结构,不仅具有超细晶结构的高强度,同时具有传统粗晶的大塑性。他们利用异步轧制技术和退火,把常规金属钛变形成为一种“软-硬”复合的层片状微结构,其中高强度的超细晶“硬”层片为基体,弥散分布着体积分数约为25%、大塑性的再结晶晶粒的“软”层片。他们的工作提出了一种可同时获得超细晶的高强度和粗晶塑性的新思路,这样的力学性能完美结合是以
Recently, the Chinese Academy of Sciences Institute of Mechanics of nano-metallic mechanical behavior group and the United States North Carolina State University researchers to develop a new titanium in the microstructure, not only has high strength ultrafine-grained structure, while the traditional Macrocrystalline plasticity. They use asynchronous rolling technology and annealing to deform conventional titanium metal into a “soft-hard” composite lamellar microstructure with high-strength, ultrafine-grained “hard” layers as the matrix, Distribution of volume fraction of about 25%, large plastic recrystallization grain “soft ” slice. Their work presents a new idea that both high strength and coarse-grained plasticity of ultra-fine grain can be obtained simultaneously. The perfect combination of mechanical properties is based on