摘要
利用透射电镜和高分辨电子显微镜对Cu-0.36Cr-0.03Zr合金时效处理后的析出相进行观察分析。结果表明,经450℃时效4 h后,合金显微硬度达到峰值,析出相为具有花瓣状应变场衬度的面心立方Cr相,与基体完全共格;当时效时间延长至8 h时,面心立方Cr相转变为体心立方Cr相;经550℃时效2 h后,合金显微硬度达到峰值,合金中弥散析出相呈球状,通过衍射花样标定,析出相为体心立方Cr相和Cu4Zr相,且Cr相与Cu基体之间存在N-W位向关系。
Morphology of precipitates in a Cu-0. 36Cr-0.03Zr alloy was observed by means of transmission electron microscopy （ TEM ） and high resolution transmission electron microscopy （ HRTEM）. The results show that the peak microhardness of the alloy aged at 450 ℃for 4 h results from the coherent face-centered cubic Cr-phases with petal-shaped contrast. The face-centered cubic Cr-phases transform into body-centered cubic Cr-phases when aging time prolongs to 8 h. The microhardness of the alloy aged at 550 ℃ for 2 h reaches the maximum and the spherical dispersed precipitates in the alloy are identified as body-centered cubic Cr-particles and Cu4Zr-particles by indexing diffraction patterns. The Cr-particles exhibit the N-W orientation relationship with Cu matrix.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第2期43-46,共4页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(50571035)
长江学者和创新团队发展计划资助(IRT1234)
河南省高校科技创新团队支持计划(2012IRTSTHN008)
