摘要
选择400、600、743、753、873和973 K,进行30 min和3 h的等温退火,用XRD、万能试验机和SEM研究退火处理对Cu基块状非晶合金压缩性能的影响。结果表明,随着退火时间的延长,Cu基块状非晶合金的起始晶化温度逐渐降低;试样经过30 min和3 h的退火处理后,其压缩曲线均为线弹性,没有明显的非弹性屈服过程;在600、743和753 K经过30 min的退火处理后的压缩强度的变化趋势为降低-升高-降低的模式,与经过3 h退火处理的压缩强度的变化趋势相反,对压缩强度的变化原因进行了初步分析;Cu基块状非晶合金在743 K退火30 min后的压缩性能最好,压缩强度达到2138 MPa。
Cu-based bulk metallic glass（BMG） was isothermally annealed at 400,600,743,753,873 and 973 K for 30 min and 3 h.Compressive properties of the annealed BMGs were studied by X-ray diffraction（XRD）,compressive test machine and scanning electron microscope（SEM）.The results indicate the start crystallization temperature of Cu-based BMGs is reduced gradually with increase of annealing time.Compressive stress-stain curves of the samples annealed for 30 minutes and 3 hours exhibit linear elasticity and no obvious inelastic yielding is observed.Higher compressive strength which is 2138 MPa is obtained for the sample annealed at 743 K for 30 min compared with that annealed at 600 and 753 K for same time,however,the reverse is observed for the samples annealed for 3 hours at the same temperature.The reason for such changes of compressive strength is analyzed.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2011年第5期27-31,共5页
Transactions of Materials and Heat Treatment
基金
国家自然基金(50961008)
关键词
Cu基块状非晶
等温退火
晶化
压缩性能
Cu-based BMG
isothermal annealing
crystallization
compressive property
