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Studies on alloying process of a ferritic/martensitic oxide dispersion strengthened (ODS) steel prepared by mechanical alloying of elemental powders

机译:通过元素粉末的机械合金化制备的铁素体/马氏体氧化物弥散强化(ODS)钢的合金化工艺研究

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摘要

Ferritic/martensitic oxide dispersion strengthened steel with a nominal composition of Fe-9Cr-2W-0.2Ti-0.12C-0.35Y(2)O(3) was produced by mechanical alloying in a high energy horizontal Simoloyer attritor. Powder samples were collected at intervals of 0.5, 1, 2, 3, 5, 7 and 10h and analysed by X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, transmission electron microscopy and differential thermal analysis. The alloying elements (Cr and W) got dissolved in the matrix in 7h milled powder. Crystallite size decreased rapidly with milling time up to 5h milling and reached a stable size of similar to 12 nm after 7h, whereas strain and lattice parameter were found to increase with milling time. The particle size increased up to 2h milling and then decreased with milling time. A fine and uniform particle size of similar to 25 nm was obtained after 7h milling. The alloying process and distribution of alloying elements/Y2O3 is studied in the present work.
机译:通过在高能水平Simoloyer磨碎机中机械合金化生产标称成分为Fe-9Cr-2W-0.2Ti-0.12C-0.35Y(2)O(3)的铁素体/马氏体氧化物弥散强化钢。以0.5、1、2、3、5、7和10h的间隔收集粉末样品,并通过X射线衍射,扫描电子显微镜,能量分散光谱,透射电子显微镜和差热分析进行分析。合金元素(Cr和W)溶解在7h研磨粉中的基体中。直至5h的研磨时间,微晶尺寸迅速降低,并在7h后达到接近12 nm的稳定尺寸,而应变和晶格参数随研磨时间而增加。直到磨碎2h粒度才增加,然后随着磨碎时间而减小。研磨7小时后,获得了类似于25 nm的细而均匀的粒径。本文研究了合金元素/ Y2O3的合金化过程及其分布。

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