梯度分离对纳米晶Fe-W合金拉伸性能的影响
Gradient Segregation Effects on the Tensile Behaviors of Nanocrystalline Fe-W Alloys
DOI: 10.12677/japc.2026.152013, PDF,   
作者: 张 烽, 彭贺阳, 王云龙：南京工程学院机械工程学院，江苏 南京；朱大胜：南京工程学院机械工程学院，江苏 南京；新疆联海创智信息科技有限公司，新疆 乌鲁木齐
关键词: 铁–钨合金；溶质浓度；相变；Fe-W Alloys； Solute Concentration； Phase Transition
摘要: 晶界内部的晶粒状结构是通过等距缩放法检测到的部分偏析区域。基于该方法，构建了具有梯度偏析的纳米晶Fe-W合金模型。通过分子动力学(MD)模拟研究了体心立方合金中溶质浓度(SC)分布如何更符合强度提升。模拟结果表明，晶内SC较低的试样具有更高的流动应力水平、更多的位错活动以及更窄的非晶晶间膜(AIFs)。这一发现揭示了体心立方合金的内在变形机制如何受到异质性偏析梯度的显著影响。
Abstract: The granular interior to the grain border is some of the segregated regions that are detected using the equidistance scaling method. Based on this method, the model of nanocrystalline Fe-W alloy with gradient segregation is crafted. The topic of how the solute concentration (SC) distribution in BCC alloys is more matched to the strength improvement is investigated using molecular dynamic (MD) simulation. The simulation outcomes demonstrate that specimens with lower intra-granular SC have greater flow stress levels, more dislocation activities, and narrower amorphous inter-granular films (AIFs). The discovery illustrates how the intrinsic deformation mechanism of BCC alloys is significantly impacted by heterogeneous segregation gradient.
文章引用：张烽, 彭贺阳, 朱大胜, 王云龙. 梯度分离对纳米晶Fe-W合金拉伸性能的影响[J]. 物理化学进展, 2026, 15(2): 122-128. https://doi.org/10.12677/japc.2026.152013

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