High-Speed Superplastic Forging of High-Strength Light Alloys

高强度轻合金高速超塑性锻造

• 批准号: 04650629
• 负责人: ISHIKAWA Takashi
• 金额: $ 1.28万
• 依托单位: NAGOYA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650629/
• 关键词: superplastic material; forging; mechanical alloying; aluminium alloy; mechanical press; fine grain size; strain rate; TEM microstructure

Al-Cu-Mg and Al-Cu-Mg-Zn alloys are made by mechanical alloying process. The influence of the condition of mechanical alloying, compaction and extrusion on the superplastic behavior and microstructure of the material are investigated. Upset and spike forging are conducted by a hydraulic press (low speed) and mechanical press (high speed). The grain size isn't affected by mechanical alloying time when mechanical alloying time becomes long to some extent but there is the most suitable mechanical alloying time for superplastic elongation. The grain size becomes fine according to decrease of extrusion temperature and the fine grain is stable after the heat treatment and tensile test are carried out. The superplastic elongation of mechanically alloyed material becomes large according to the decrease of grain size. The material developed is suitable in the actual use because its tensile strength at room temperature is very high and it shows superplastic elongation in as high speed as mechanical press. The mechanism of high speed superplastic deformation is discussed by using finite element analysis. Forging limit of these materials is very high when high speed mechanical press is used.

Al-Cu-Mg和Al-Cu-Mg-Zn系合金采用机械合金化工艺制备。研究了机械合金化、压制和挤压工艺条件对材料超塑性行为和显微组织的影响。镦粗和长钉锻造是由液压机（低速）和机械压力机（高速）进行的。当机械合金化时间延长到一定程度时，晶粒尺寸不受机械合金化时间的影响，但存在一个最适合超塑延伸的机械合金化时间。随着挤压温度的降低，晶粒尺寸逐渐细化，经热处理和拉伸试验后，晶粒尺寸稳定。机械合金化材料的超塑延伸率随晶粒尺寸的减小而增大。该材料室温抗拉强度高，在机械压力机的高速下表现出超塑性延伸，适合于实际应用。用有限元分析方法探讨了高速超塑性变形的机理。这些材料在高速机械压力机上的锻造极限很高。

项目成果

T.Ishikawa, M.Kato, N.Yukawa, T.Jimma: "Superplastic Behavior and Mirostructure of Mechanically Alloyed Al-Cu-Mg alloy" Journal of Japan Institute of Light Metals. vol.43. 269-274 (1993)

T.Ishikawa、M.Kato、N.Yukawa、T.Jimma：“机械合金化 Al-Cu-Mg 合金的超塑性行为和微观结构”日本轻金属研究所杂志。

T.Ishikawa: "Modeling of Superplastic Deformation of Mechanically Alloyed Aluminum Alloy" Proc.1st International Conference on Processing Materials for Properties. 1. 725-728 (1993)

T.Ishikawa：“机械合金化铝合金超塑性变形的建模”Proc.第一届国际加工材料会议。

T.Ishikawa,M.Kato,N.Yukawa,T.Jimma: "Modeling of Superplastic Deformation of Mechanically Alloyed Aluminum Alloy" Proc.1st International Conference on Processing Materials for Properties. 1. 725-728 (1993)

T.Ishikawa，M.Kato，N.Yukawa，T.Jimma：“机械合金化铝合金超塑性变形的建模”Proc.第一届国际加工材料会议。

石川孝司: "メカニカルアロイング法で作製したAl合金の超塑性変形と微細組織" 軽金属. 43. 269-274 (1993)

Takashi Ishikawa：“机械合金化方法制备的铝合金的超塑性变形和显微组织”轻金属 43. 269-274 (1993)。

石川孝司、加藤雅巳、湯川伸樹、神馬敬: "メカニカルアロイング法で作製したAl合金の超塑性変形と微細組織" 軽金属. 43. 269-274 (1993)

Takashi Ishikawa、Masami Kato、Nobuki Yukawa、Takashi Kamima：“机械合金化方法制备的铝合金的超塑性变形和显微组织”轻金属 43. 269-274 (1993)。