摘要
研究了［123］Cu－16％Al单晶在不同塑性应变幅下的循环形变行为结果表明，试样在整个循环过程中表现出较低的硬化率，且几乎与应变幅大小无关在γp1＝5．3×10－5－64×10－4范围内，循环最大切应力和循环最小切应力几乎与应变幅无关，当γp1＞6．4×10－4时，表现为缓慢硬化随着应变突发的发生，滑移带逐渐增多，在低应变幅γp＝5．3×10－5下驻留Luders带（PLB）不均匀，存在局部无形变区；在其它塑性应变幅下。
The cyclic deformation behaviors of [123]Cu-16%Al single crystals at different plastic strain amplitudes were studied. The results show that the cyclic hardening rate has small value during cyclic deformation, and it is independed to the strain amplitude. The maximum cyclic stress and the minimum cyclic stress are not relate to strain amplitude at γ1=5.3x10-5-6.4x10-4, but increase slowly at γp1>6.4x10-4. The amount of the slip bands increase with strain burst, the persistent Luders bands are seperatly located on the gague at γp1=5.3x10-5, while they became umiformly distribute on the whole gague at higher strain amplitude.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第7期711-714,共4页
Acta Metallurgica Sinica
基金
国家自然科学基金!19392300-4
关键词
单晶
循环形变
硬化率
铜合金
Cu-based single crystal
cyclic deformation
hardening rate
