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首页> 外文期刊>Materials Science and Engineering >The effect of particle size of iron powder on a to γ transformation in the nanostructured high nitrogen Fe-Cr-Mn-Mo stainless steel produced by mechanical alloying
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The effect of particle size of iron powder on a to γ transformation in the nanostructured high nitrogen Fe-Cr-Mn-Mo stainless steel produced by mechanical alloying

机译：机械合金化生产的纳米结构高氮Fe-Cr-Mn-Mo不锈钢中铁粉粒径对a至γ转变的影响

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摘要

In this study, the effect of particle size of iron powder on a to y transformation in the nanostructured high nitrogen Fe-18Cr-10Mn-4Mo stainless steel, produced by mechanical alloying (MA) was investigated. For this purpose iron powders with two different particle sizes were used. MA was performed under nitrogen atmosphere, using a high-energy planetary ball mill. X-ray diffraction (XRD) patterns and nitrogen analysis revealed that by decreasing the iron mean particle size, a higher transformation rate is obtained due to increase in the rate of nitrogen absorption. Moreover, nitrogen solubility in both milled samples was increased noticeably by increasing the milling time. This is believed to be due to the increase of lattice defects and development of nanostructure through MA. Variations of grain size and internal lattice strain versus milling time, for both iron particle sizes, showed that the critical ferrite grain size for austenite nucleation is less than 10 nm.
机译：在这项研究中，研究了通过机械合金化（MA）生产的纳米结构高氮Fe-18Cr-10Mn-4Mo不锈钢中铁粉粒径对y转变的影响。为此，使用具有两种不同粒径的铁粉。使用高能行星式球磨机在氮气气氛下进行MA。 X射线衍射（XRD）图谱和氮分析表明，通过降低铁的平均粒径，由于氮吸收率的提高，可以获得更高的转化率。而且，通过增加研磨时间，两个研磨样品中的氮溶解度显着增加。据信这是由于晶格缺陷的增加和通过MA的纳米结构的发展。对于两种铁粒度，晶粒尺寸和内部晶格应变随铣削时间的变化表明，奥氏体成核的临界铁素体晶粒尺寸小于10 nm。

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