The present paper reports the effect of plain strain deformation on grain strengthening mechanism of iron (Fe) - alumina (Al2O3) Metal Matrix Nanocomposites (MMNCs) fabricated through powder metallurgical (P/M) processing. Specimens for the present study were weighed in required amount, ball milled, compacted at a load of 5, 6 and 7 tons followed by sintering in an atmospheric controlled furnace at 1100 °C for 1 hour. Plain strain deformation of samples was carried out at a load of 5 tons under different interfacial condition i.e. dry, solid lubricant and liquid lubricant. XRD studies reveal the formation of iron, alumina and nano iron-aluminate (FeAl2O4) phases respectively. Maximum average sintered density investigated for the specimen is found to be 4.6179 gm/cc compacted under 7 tons of load and minimum sintered density is found to be 4.4572 gm/cc for specimen compacted under 5 tons of load. Overall, fabricated Fe-Al2O3 metal matrix nanocomposites with powder metallurgy route when characterized for plain strain deformation shows strengthening between grain and grain boundary which can be a good candidate material for application in railways especially while designing railway structures and tracks.

中文翻译：

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平面应变变形对Fe-Al2O3金属基纳米复合材料晶粒强化机制的影响

本文报道了平面应变变形对通过粉末冶金 (P/M) 加工制造的铁 (Fe) - 氧化铝 (Al2O3) 金属基纳米复合材料 (MMNC) 的晶粒强化机制的影响。本研究的样品按所需量称重、球磨、压实，负载分别为 5、6 和 7 吨，然后在大气控制的炉中在 1100 °C 下烧结 1 小时。样品的平面应变变形是在不同的界面条件下，即干燥、固体润滑剂和液体润滑剂，在 5 吨的载荷下进行的。XRD 研究分别揭示了铁、氧化铝和纳米铁铝酸盐 (FeAl2O4) 相的形成。发现在 7 吨载荷下压实的试样的最大平均烧结密度为 4.6179 gm/cc，发现最小烧结密度为 4。4572 gm/cc 对于在 5 吨负载下压实的试样。总体而言，采用粉末冶金路线制造的 Fe-Al2O3 金属基纳米复合材料在进行平面应变变形表征时显示出晶粒和晶界之间的强化，这可以成为铁路应用的良好候选材料，尤其是在设计铁路结构和轨道时。