Ni3Ti纳米沉淀原位强化高模量钢

IF 6.1 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Cainv Ma, Yizhuang Li, Jialin Chen, Hongshuang Di, Wei Xu
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引用次数: 0

摘要

高模量钢(hms)的低屈服强度阻碍了其作为高刚性结构材料在建筑和交通等关键领域的实际应用。为了应对这一挑战,我们在Fe-Ti-B合金体系中引入了少量的镍,利用马氏体时效钢的强化概念,而不会显著增加合金化成本。结果表明,添加ni的HMS在热轧状态下通过TiB2增强,在铁素体基体中含有致密的Ni3Ti纳米沉淀。这些纳米沉淀物有效地缩短了位错段,从而增加了位错连续运动所需的流动应力。同时,这种新型HMS保持了高杨氏模量和低密度,与现有的Fe-TiB2钢相当。这项工作提供了一种可行的方法来生产具有成本效益的高模量钢,提高强度水平,适合结构应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
In-situ high modulus steel strengthened with Ni3Ti nano-precipitation
The low yield strength of high modulus steels (HMSs) hampers their practical applications as high-rigid structural materials in key sectors such as construction and transportation. To address this challenge, we introduce a small amount of nickel into the Fe-Ti-B alloy system, leveraging the strengthening concept of maraging steels without significantly increasing alloying costs. The resulting Ni-added HMS, in its as-hot-rolled state and reinforced with TiB2, contains dense Ni3Ti nanoprecipitates within the ferrite matrix. These nanoprecipitates effectively shorten dislocation segments, thereby increasing the flow stress required for the continuous dislocation movement. Meanwhile, this new HMS maintains a high Young's modulus and low density, comparable to existing Fe-TiB2 steel. This work offers a viable approach to producing cost-effective high modulus steels with enhanced strength levels suitable for structural applications.
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来源期刊
Materials Science and Engineering: A
Materials Science and Engineering: A 工程技术-材料科学:综合
CiteScore
11.50
自引率
15.60%
发文量
1811
审稿时长
31 days
期刊介绍: Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.
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