Thermal annealing action on plastic deformation of submicrocrystalline alpha-iron

Proceedings of the 9th International Scientific and Practical Conference of Students, Post-graduates Modern Techniques and Technologies, 2003. MTT 2003. Pub Date : 2003-04-07 DOI:10.1109/SPCMTT.2003.1438189

A. Son

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Abstract

The unique physical and chemical, mechanical properties of nano- and submicrocrystalline materials are due to such factors as the small size of grains, defective structure of the grains boundaries, high level of the internal stresses, microstrainings of crystal lattice, and high density of grain-boundary dislocations. This paper considers the structure, mechanical characteristics and the peculiarities of plastic flow of SMC Armco-iron subjected to thermal annealing at different temperatures. Structural investigations were performed by the methods of translucent electron microscopy (TEM). Investigation of straining relief showed that regardless of the mode and the quantity of passages in even-channel angular pressing the samples of SMC alpha-Fe have high tendency to the straining localization. Mechanical properties of the investigated samples are determined by the mode of ECAP. Thermal annealing of the samples of SMC alpha-Fe allows one to change their mechanical characteristics within wide ranges.

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热退火对亚微晶α铁塑性变形的影响

纳米和亚微晶材料独特的物理、化学和力学性能是由于晶粒尺寸小、晶界结构缺陷、内应力大、晶格微应变大、晶界位错密度大等因素造成的。本文研究了SMC arm -iron在不同温度下经热处理后的结构、力学特性和塑性流动特性。用透射电镜(TEM)对其结构进行了研究。应变释放研究表明，在均匀通道角压下，SMC α - fe试样无论采用何种模态和通道数，都有较高的应变局域化倾向。研究样品的力学性能由ECAP模式确定。SMC α - fe样品的热退火可以在很大范围内改变其力学特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 9th International Scientific and Practical Conference of Students, Post-graduates Modern Techniques and Technologies, 2003. MTT 2003.

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