摘要
通过对SiCw／6061Al与SiCp／2024Al复合材料的蠕变及循环蠕变行为的对比研究发现，虽然SiCw／6061Al复合材料与SiCp／2024Al复合材料相比有较高的蠕变抗力，但其蠕变门槛应力却较低．两种材料在298℃都显示循环蠕变减速行为，但后者更明显．SiCw／6061Al复合材料的稳态循环蠕变速率随卸载量增加首先降低然后升高。
The high temperature creep and cyclic creep behaviours of SiCw/6061Al and SiCp/2024Al composites were studied at 298℃. It was found that SiCw/6061Al composite showed better creep resistance but lower creep threshold stress as compared to SiCp/2024Al composite.Both composites showed cyclic creep retardation(CCR)in the tested stress region, while the CCR for SiCp/2024Al composite was more pronounced. For the SiCw/6061Alcomposite,the minimum cyclic creep rate decreased first and then increased with increasing the unloading amount, while for the SiCp/2024Al,the minimum cyclic creep rate decreased monotonically with increasing unloading amount.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1997年第11期1227-1232,共6页
Acta Metallurgica Sinica
