Cu-0.36Cr-0.03Zr合金时效析出相  

Aging precipitation in Cu-0. 36Cr-0. 03Zr alloy

作　　者：丁宗业[1] 贾淑果[1,2] 邓猛[1] 宋克兴[1,2] 刘平[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]河南省有色金属材料科学与加工技术重点实验室,河南洛阳471023

出　　处：《材料热处理学报》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)

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.

关 键 词：CU-O 36Cr 0 03Zr合金 时效处理 析出相 晶体取向关系 

分 类 号：TG146.1[一般工业技术—材料科学与工程]