用SANS研究了钒微合金钢中纳米碳化物的间相和无规析出

IF 3.5 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Zamran Zahoor Khan, Steven R. Parnell, S. Erik Offerman, Diego Alba Venero, Amir Sabet Ghorabaei, Bart J. Kooi, Niels van Dijk
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引用次数: 0

摘要

本文报道了两种不同热处理方法下钢中纳米级碳化钒(VC)析出物的形成。热处理导致相间析出(IP)或随机析出(RP)。采用小角中子散射测量和透射电镜分析相结合的方法测定了VC相的体积分数和粒径分布。可以看出,与经历RP的样品相比,经历IP的样品显示出更高的VC相密度。此外,在RP样品中观察到更广泛的析出半径分布,其中透镜状的纳米级VC析出物主要分布在晶界(gb)和亚晶界(sgb),较小的析出物分散在基体内。可以看出,当沉淀机制为IP时,碳和钒的加入并没有增加VC相数密度,而在RP的情况下,碳和钒的加入增加了VC相数密度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Interphase and random nanoscale carbide precipitation in vanadium micro-alloyed steels studied using SANS

The formation of nanoscale vanadium carbide (VC) precipitates is reported in steels subjected to two different thermal treatments. The thermal treatments lead to either interphase precipitation (IP) or random precipitation (RP). Small-angle neutron scattering measurements coupled with transmission electron microscopy analysis are performed to determine the VC precipitate volume fraction and size distribution. It is seen that the samples exhibiting IP show a higher number density of VC precipitates compared to those undergoing RP. Moreover, a broader size distribution of the precipitate radii is observed in the samples with RP, where lens-shaped nanoscale VC precipitates are found predominantly at grain boundaries (GBs) and sub-grain boundaries (SGBs), with smaller precipitates dispersed within the matrix. It is seen that the addition of carbon and vanadium does not increase the VC precipitate number density when the mechanism of precipitation is IP, whereas an increase in the VC precipitate number density with carbon and vanadium addition is seen in case of RP.

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来源期刊
Journal of Materials Science
Journal of Materials Science 工程技术-材料科学:综合
CiteScore
7.90
自引率
4.40%
发文量
1297
审稿时长
2.4 months
期刊介绍: The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.
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