Creep Behavior and Microstructure Characteristics of 2219T87 Aluminum Alloy

WANG JianGuo; HAN Zhewen; XI Shuaiying; LI Zhuang; WANG Chunshui; SONG Zibo; FU Xuesong; ZHOU Wenlong; CHEN Guoqing

doi:10.16080/j.issn1671-833x.2025.20.155

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Creep Behavior and Microstructure Characteristics of 2219T87 Aluminum Alloy

更新时间：2026-03-27

- Creep Behavior and Microstructure Characteristics of 2219T87 Aluminum Alloy
- Aeronautical Manufacturing Technology Vol. 68, Issue 20, (2025)
- 作者机构：
  
  1. 国网冀北电力有限公司电力科学研究院,北京,100045
  2. 辽宁省凝固控制与数字化制备技术重点实验室,大连,116085
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2025.20.155
  CLC：
- Published：2025
- 稿件说明：
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WANG JianGuo, HAN Zhewen, XI Shuaiying, et al. Creep Behavior and Microstructure Characteristics of 2219T87 Aluminum Alloy[J]. Aeronautical Manufacturing Technology, 2025, 68(20).
DOI：

WANG JianGuo, HAN Zhewen, XI Shuaiying, et al. Creep Behavior and Microstructure Characteristics of 2219T87 Aluminum Alloy[J]. Aeronautical Manufacturing Technology, 2025, 68(20). DOI： 10.16080/j.issn1671-833x.2025.20.155.

摘要

通过蠕变试验研究了2219T87 铝合金在不同应力状态下的蠕变变形行为。结果表明，2219T87 铝合金的蠕变总应变随着应力的增加而增加，拉伸状态下的蠕变总应变高于压缩状态下的总应变。拉伸应力300 MPa 下，300 h 后的蠕变总应变达到0.634%，与外加200 MPa 应力相比增加了72.3%，与压缩状态相比增加了13.6%。微观组织观察表明，原始态组织中析出相大部分呈点状，均匀分布在铝合金基体上；经过蠕变之后析出相数量明显减少， TEM 观察以及XRD 计算验证了析出相回溶的发生。计算得到的蠕变应力指数为3.17，证明蠕变机制受晶界滑动所控制。

Abstract

The creep deformation behavior of 2219T87 aluminum alloy under different stress states is studied through creep experiments. The results show that the total creep strain of 2219T87 aluminum alloy increases with the increase of stress

and the total creep strain in tensile state is higher than that in compressive state. Under the tensile stress of 300 MPa

the total creep strain after 300 h reaches 0.634%

which is 72.3% higher than that under the stress of 200 MPa and 13.6% higher than that under compression. The observation of microstructure shows that the precipitated phases in the original state are dot-like and reticulate

and evenly distributed on the aluminum alloy matrix. After creep

the number of precipitated phases decreased obviously. TEM observation and XRD calculation verified the occurrence of redissolution of precipitated phases. The calculated creep stress index is 3.17

which proves that the creep mechanism is controlled by grain boundary sliding.

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