摘要
本文研究了退火 Al-0.025wt-%Mg 和99.6wt-%Al 多晶在疲劳早期阶段应力、内耗、超声衰减的变化,并与99.999wt-%Al 对比进行了讨论。结果表明,稀 Al 合金中少量溶质原子的存在提高应力的整体高度,推迟循环软化的出现,降低疲劳过程中的内耗值及超声衰减值。
Variations of the stress σ,internal friction Q^(-1)and ultrasonic attenuation Δαwith cycling number N under push-pull fatigue strain for Al-0.025wt-%Mg and 99.6wt-%Alpolycrystalline specimens were measured.Experimenial results indicate that the existance of asmall amount solute atoms in the dilute aluminium alloy obviously elevates the height of wholestress,delays the emergence of cyclic softening and drops the height of internal friction andultrasonic attenuation.
基金
国家自然科学基金
关键词
疲劳
应力
内耗
铝合金
fatigue
solute atom
stress
internal friction
ultrasonic attenuation
