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高压扭转Cu试样微观组织的热稳定性分析
Alternative TitleANALYSIS OF THE THERMAL STABILITY OF COPPER SPECIMENS DEFORMED BY HIGH-PRESSURE TORSION
谢子令; 武晓雷; 谢季佳; 洪友士
Source Publication金属学报=Acta Metallurgica Sinica
2010-04-11
Volume46Issue:04Pages:458-465
ISSN0412-1961
Abstract通过高压扭转对Cu试样施加不同程度的变形,利用OM,TEM及差示扫描量热仪(DSC)对变形组织微观结构及其热稳定性进行了分析.在较小的变形程度下,变形组织为高位错密度的位错胞、亚晶组织,试样的变形储能随变形量的增大而增大,在切应变等于13时达到最大,为0.91 J/mol,DSC曲线显示的放热峰随变形量的增大向低温方向偏移;进一步变形,动态回复加剧,高位错密度的亚晶组织逐渐演化成无位错的等轴状晶粒组织,试样的变形储能减小,组织的稳定性提高.显微硬度随退火温度的提高而减小,晶粒的明显长大导致显微硬度急剧减小.出现明显晶粒长大的温度较DSC曲线显示的放热峰起始温度低45℃左右,这主要是由于变形组织的回复再结晶过程是退火温度与时间的函数,降低处理温度并延长处理时间能达到与高温短时处理相同的效果.
KeywordCu 高压扭转(Hpt) 微观结构 热稳定性
DOI10.3724/SP.J.1037.2009.00673
URL查看原文
Indexed BySCI ; EI ; CSCD
Language中文
WOS IDWOS:000276977900012
WOS KeywordMICROSTRUCTURAL EVOLUTION ; DEFORMATION ; CU
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding Organization国家自然科学基金项目10721202,10772178和50571110资助~~
CSCD IDCSCD:3934417
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/43994
Collection非线性力学国家重点实验室
Corresponding Author谢子令
Recommended Citation
GB/T 7714
谢子令,武晓雷,谢季佳,等. 高压扭转Cu试样微观组织的热稳定性分析[J]. 金属学报=Acta Metallurgica Sinica,2010,46(04):458-465.
APA 谢子令,武晓雷,谢季佳,&洪友士.(2010).高压扭转Cu试样微观组织的热稳定性分析.金属学报=Acta Metallurgica Sinica,46(04),458-465.
MLA 谢子令,et al."高压扭转Cu试样微观组织的热稳定性分析".金属学报=Acta Metallurgica Sinica 46.04(2010):458-465.
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