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首页> 外文会议>Light metals 2016 >APPLICATION OF SECONDARY SHEAR EFFECTS IN THE EXTRUSION MACHINING PROCESS TO EXPLORE RECRYSTALLIZATION MECHANICS DURING CONVENTIONAL EXTRUSION OF 7050 ALUMINUM
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APPLICATION OF SECONDARY SHEAR EFFECTS IN THE EXTRUSION MACHINING PROCESS TO EXPLORE RECRYSTALLIZATION MECHANICS DURING CONVENTIONAL EXTRUSION OF 7050 ALUMINUM

机译：二次剪切效应在挤压机加工工艺中的应用，以探讨常规挤压7050铝过程中的再结晶机理

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摘要

Extrusion machining combines cutting with simultaneousrnextrusion using an additional constraining tool to induce veryrnlarge and well-characterized strains. Unlike conventionalrnextrusion, accurate analytical models exist for extrusionrnmachining to calculate values of effective strain, strain rate, andrntemperature rise as a function of processing parameters.rnAdditionally, the size, shape, and microstructural effects of arnsecondary shear zone that forms due to friction during extrusionrnmachining have been characterized. This secondary shear zonerncan be manipulated by varying processing parameters, and canrnproduce a severely inhomogeneous microstructure. Thisrnmicrostructure is also seen during conventional extrusion, as thernmaterial on the outside of the extrudate is strained more than therninside material, potentially causing an incomplete recrystallizationrnacross the face of the product. The secondary shear effect in thernextrusion machining process is utilized to reproduce therninhomogeneous microstructure seen in conventional extrusion inrnorder to better understand the recrystallization behavior duringrnAA7050 extrusion.
机译：挤压加工使用额外的约束工具将切割与同时挤压相结合，以产生非常大且特征明确的应变。与传统的挤压不同，存在精确的分析模型来进行挤压加工，以计算有效应变，应变率和温度升高值作为加工参数的函数。此外，挤压过程中由于摩擦而形成的二次剪切区的尺寸，形状和微观结构效应具有被表征。可以通过改变加工参数来操纵该次级剪切区，并且可以产生严重不均匀的微观结构。在常规挤出过程中还可以看到这种微观结构，因为挤出物外部的材料比其内层材料更易变形，从而可能导致整个产品表面的不完全重结晶。利用挤出加工过程中的二次剪切效应来再现常规挤出顺序中看到的非均质微观结构，以更好地了解rnAA7050挤出过程中的再结晶行为。

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  • 来源
    《Light metals 2016》|2016年|219-224|共6页
  • 会议地点 Downtown Nashville TN(US)
  • 作者

    Daniel R. Klenosky; David R. Johnson; Kevin P. Trumble;

  • 作者单位

    School of Materials Engineering, Purdue University 701 Northwestern Avenue, Neil Armstrong Hall of Engineering West Lafayette, IN,47907, USA;

    School of Materials Engineering, Purdue University 701 Northwestern Avenue, Neil Armstrong Hall of Engineering West Lafayette, IN,47907, USA;

    School of Materials Engineering, Purdue University 701 Northwestern Avenue, Neil Armstrong Hall of Engineering West Lafayette, IN,47907, USA;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Aluminum; extrusion; machining; recrystallization; 7050 alloy;

    机译：铝;挤压;机械加工;重结晶; 7050合金;

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