Development of High Temperature Aluminum Alloy by Optimum Control in Mechanical Solution Treatment-Nano Phase precipitation Process

机械固溶处理-纳米相沉淀工艺优化控制开发高温铝合金

基本信息

批准号：
07650814
负责人：
MATSUKI Kenji
金额：
$ 0.45万
依托单位：
TOYAMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

Mechanical alloying (MA) of air atomized (RS) 2024Al-3Fe-5 Ni and Al-3Fe-3 Ni-3Cr-0.7Zr (in mass%) alloy powder was performed with a vibrational ball mill for 0-154.8 ks in an argon atmosphere.1. The fine dispersions of intermetallic particles as Al_9FeNi phase and the quasicrystalline Al_<80>Cr_<13.5>Fe_<6.5> phase, respectively, were found to be the main factor for the strengthening of RS 2024Al-3Fe-5Ni and RS Al-3Fe-3Ni-3Cr-0.7Zr alloy at ambient and high temperature to 573K.2. The results of DSC,XRD and TEM revealed that, with MA time, the primary intermetallic compounds in atomized powder were dispersed finely and the transition elements in the many compounds were finally super-saturated in matrix by the high energy of MA.3. During hot-extrusion process at 673K,in the case of the Al-3Fe-3Ni-3Cr-0.7Zr alloy, the transition elements were precipitated finely as Al_3Fe, and Al_3Ni and Al_<13>Cr_2 phase particles on boundaries or interior of sub-grains formed extremely fine scale. The tensile strength at room temperature and at 573K were about 431.9MPa and 208.7MPa for extrusion specimen from atomized powder, and 675.7MPa and 281MPa for extrusion specimen from 154.8ks-MA powder, respectively. However the ductility was poor in MA materials.4. Improvements in the ambient and elevated temperature strength with MA are mainly attributed to the presence of extremely fine grain structure and finely dispersed particles which were introduced during MA and consolidation process.

机械合金（MA）空气原子化（RS）2024Al-3FE-5 Ni和Al-3fe-3 Ni-3cr-0.7zr（以质量％）合金粉末在0-154.8 ks中进行0-154.8 KS的振动球粉（以质量％）合金粉氩气气氛1。金属间颗粒作为Al_9feni相的精细分散和Quasicrystalline Al_ <80> cr_ <13.5> fe_ <6.5>阶段分别被认为是加强2024Al-3FE-5NI和RS AL-3FE-3FE和RS AL-3FE的主要因素-3NI-3CR-0.7ZR合金在环境和高温下为573K.2。 DSC，XRD和TEM的结果表明，随着MA的MA，雾化粉末中的主要金属间化合物分散了，并且MA.3的高能量最终将许多化合物中的过渡元素在基质中超饱和。在673K的热解，在AL-3FE-3FE-3NI-3CR-0.7ZR合金的情况下，过渡元件被细分为Al_3Fe，Al_3ni和Al_3ni和Al_ <13> Cr_2相位粒子在边界或子内部的内部或内部 - 晶粒形成极为细的比例。室温和573K处的拉伸强度分别为431.9mpa和208.7MPa，用于催化粉的挤出样品，675.7MPa和281MPa和281MPa分别用于154.8ks-MA粉末的挤出样品。但是，MA材料中的延展性很差。4。 MA的环境和升高温度强度的改善主要归因于存在极为细的晶粒结构以及在MA和巩固过程中引入的精细分散颗粒。