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首页> 外文期刊>Materials Science and Engineering >Compressive strength and hot deformation behavior of TX32 magnesium alloy with 0.4% Al and 0.4% Si additions
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Compressive strength and hot deformation behavior of TX32 magnesium alloy with 0.4% Al and 0.4% Si additions

机译：铝含量为0.4％，硅含量为0.4％的TX32镁合金的抗压强度和热变形行为

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摘要

Mg-3 wt.%Sn-2 wt.%Ca (TX32) alloy has good corrosion and creep resistance although its strength does not match that of AZ31 alloy. In this paper, the influence of additions of 0.4wt.%Al and 0.4wt.%Si on the compressive strength and hot working characteristics of TX32 is reported. Although the room temperature compressive strength improved marginally with the alloying additions, the drop in highertemperature strength is significant. By comparing with the alloy having only 0.4% Al, it is inferred that the Si addition is responsible for this deterioration. The hot working behavior is characterized by processing maps which revealed that TX32 exhibits two domains of dynamic recrystallization occurring in the temperature and strain rate ranges: (1) 300-350℃ and 0.0003-0.001 s~(-1) and (2) 390-500℃ and 0.005-0.6 s~(-1). In Al and Si containing TX32, both the domains moved to higher temperatures and the flow instability is reduced thereby improving the hot workability. In both the domains, the apparent activation energy is 177 kJ/mol, which is higher than that for self-diffusion in magnesium implying that there is a significant contribution from the back stress generated by the hard particles present in the matrix.
机译：Mg-3 wt。％Sn-2 wt。％Ca（TX32）合金具有良好的耐腐蚀和抗蠕变性，尽管其强度与AZ31合金不匹配。本文报道了添加0.4wt。％的Al和0.4wt。％的Si对TX32的抗压强度和热加工性能的影响。尽管室温下的抗压强度随合金化的添加而略有提高，但高温强度的下降却是显着的。通过与仅具有0.4％的Al的合金进行比较，可以推断出Si的添加是造成这种劣化的原因。热加工行为通过加工图来表征，该加工图揭示了TX32在温度和应变速率范围内出现两个动态再结晶域：（1）300-350℃和0.0003-0.001 s〜（-1）和（2）390 -500℃和0.005-0.6 s〜（-1）。在含有TX32的Al和Si中，两个畴都移至更高的温度，并且流动不稳定性降低，从而改善了热加工性。在这两个域中，表观活化能均为177 kJ / mol，高于镁中自扩散的活化能，这表明存在于基质中的硬质颗粒产生的背应力具有显着贡献。

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  • 来源
    《Materials Science and Engineering》 |2011年第23期|p.6964-6970|共7页
  • 作者

    K.P. Rao; Y.V.R.K.Prasad; C.Dharmendra; N.Hort; K.U. Kainer;

  • 作者单位

    Department of Manufacturing Engineering and Engineering Management, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China;

    Processingmaps.com (formerly at City University of Hong Kong, Hong Kong, China);

    Department of Manufacturing Engineering and Engineering Management, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China;

    Helmholtz-Zentrum Geesthacht, Institute of Materials Research, Magnesium Innovation Centre, Max-Planck-Strajsse I, Ceesthacht 21502, Germany;

    Helmholtz-Zentrum Geesthacht, Institute of Materials Research, Magnesium Innovation Centre, Max-Planck-Strajsse I, Ceesthacht 21502, Germany;

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  • 正文语种 eng
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  • 关键词

    magnesium alloy compressive strength hot workability processing maps kinetic analysis;

    机译：镁合金抗压强度热加工工艺图动力学分析。;

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