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热暴露温度对 7A85 铝合金晶界演化规律的影响
Effect of Thermal Exposure Temperature on Grain Boundary Evolution of 7A85 Aluminum Alloy
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- DOI:
- 作者:
- 屠 涛 ，田 军，李积珍 ，吴博瑞 ，代 盼 ，徐春杰 ， ，
TU Tao ，TIAN Jun , LI Jizhen , WU Borui ，DAI Pan ，XU Chunjie
- 作者单位:
- 1. 镁高镁诺奖（铜川）新材料有限公司，陕西 铜川 727031；2.西安谢赫特曼诺奖新材料研究院，陕西 西安 710048；3. 西 安北方庆华机电有限公司，陕西 西安 710025；4. 西安石油大学 材料科学与工程学院，陕西 西安，7100654；5. 西安理工 大学 材料科学与工程学院，陕西 西安 710048
1. Meigaomei Nobel Prize (Tongchuan) New Materials Co., Ltd., Tongchuan 727031, China; 2. Xi'an Shechtman Nobel Prize New Materials Institute, Xi'an 710048, China; 3. Xi'an North Qinghua Mechanical and Electrical Co., Ltd., Xi'an 710025, China; 4. School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China; 5. School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China
- 关键词:
- 热暴露； 7A85 铝合金；晶界
thermal exposure; 7A85 aluminum alloy; grain boundary
- 摘要:
- 通过对双级过时效态的 7A85 铝合金超厚板进行不同温度的热暴露处理，探究了热暴露温度对 7A85 铝合
金晶界组织演化特征。 结果表明，随着温度的升高，晶界处纳米级 η 析出相的尺寸不断增大，晶界无析出带的宽度逐渐
增大，同时晶界处析出相的分布由连续网状分布转变为断续分布，因此合金的抗腐蚀性能不断提高。
The evolution characteristics of grain boundary of two-step artificial overaged 7A85 aluminum alloy under
thermal exposure at different temperatures were investigated. The results show that with the increase of temperature, the
size of nano-sized precipitated η-phase at grain boundary increases, the width of precipitated zone at grain boundary
increases gradually, and the distribution of precipitated phase at grain boundary changes from continuous network
distribution to discontinuous network, so the corrosion resistance of the alloy has been improved.