Mechanisms of Commercial Aluminium Alloy LY12 During Superplastic Deformation

Huang Hailing; Wu Qingling

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Mechanisms of Commercial Aluminium Alloy LY₁₂ During Superplastic Deformation

更新时间：2020-08-12

- Mechanisms of Commercial Aluminium Alloy LY₁₂ During Superplastic Deformation
- Optics and Precision Engineering Vol. 0, Issue 1, Pages: 52-56(1989)
- 作者机构：
  
  东北工学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：15 February 1989，
  
  Published：15 February 1989
- 稿件说明：
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黄海泠, 吴庆龄. 工业铝合金LY12超塑变形机理[J]. 光学精密工程, 1989,(1): 52-56

Huang Hailing, Wu Qingling . Mechanisms of Commercial Aluminium Alloy LY12 During Superplastic Deformation[J]. Editorial Office of Optics and Precision Engineering, 1989,(1): 52-56
黄海泠, 吴庆龄. 工业铝合金LY12超塑变形机理[J]. 光学精密工程, 1989,(1): 52-56 DOI：

Huang Hailing, Wu Qingling . Mechanisms of Commercial Aluminium Alloy LY12 During Superplastic Deformation[J]. Editorial Office of Optics and Precision Engineering, 1989,(1): 52-56 DOI：

摘要

本文研究了LY

铝合金超塑变形的机理

用扫描电镜和光学显微镜观察了LY

铝合金在超塑变形过程中的表面形貌变化

半定量地研究了该合金超塑变形过程中的机理变化。研究结果表明

铝合金在超塑变形Ⅱ区

其超塑变形的主要机理为晶界滑动

晶界滑动对总变形的贡献为40～70%

调节机理为晶内位错运动和扩散蠕变;在超塑变形Ⅲ区

晶内位错运动占主要地位

其对总变形的贡献为60%以上。

Abstract

The morphology and quantitative analysis of the mechanisms in Alu-minium Alloy LY

during superplastic deformation were investiga-ted by means of SEM and optical microscope. The experimental results indicate that the mechamisms of superplastic deformation of LY

Al Al-loy in superplastic region Ⅱ are that theegrain boundary sliding (GBS) which devotes about 40-70% to total strain is the main mechanism and the diffusion creep(DC)and the dislocation slip(DIS) are accommodation mechanisms.As for superplastic region Ⅲ

DIS devotes 60% or more to the total strain

and is the main deformation mechanism.

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