摘要
研究了３００４铝合金经大变形量冷轧后进行退火时的形核行为。结果表明，在３００４铝合金再结晶退火时，主要有亚晶多边化和合并／长大形核以及粗大第二相变形区与晶界形核等形核机制。通过显微组织分析和数学计算，发现再结晶立方取向晶核的形成主要发生在变形基体中的三角晶界、粗大的Ａｌ（Ｆｅ，Ｍｎ）Ｓｉ和（Ｆｅ，Ｍｎ）Ａｌ６第二相（尺寸大于２．５μｍ）周围强烈的晶格畸变区和取向紊乱区以及变形带中具有严格或近似立方取向的亚晶粒等处。
The nucleation behavior of 3004 Aluminium alloy which has undergone a large reduction of cold rolling during annealig is investigated. Evidences surport three nucleation mechanisms,i. e. coarlescence/growth of polyganized subgrains, nuleation in the deformation bands surrounding large secndary phase particles as well as grain boundery nuleation in the form of Strain-Induced Boundary Migration (SIBM). By analysis and mathematical calculations, one can discover cube orietated nuclei to from maily at the positions of triagnle boundaries, and the violent crystal distored and misorientated zones surround coarse Al(Fe,Mn) Si and/or (Fe, Mn)Al6second particles (larger than 2.67μm in diameter). The subgrains with rigid or approximatly cube orientation in deformation bands may also act as nuclei, according to oriented-Nucleation Mechanism, during recrystallization.
出处
《材料科学与工艺》
CAS
CSCD
北大核心
1995年第4期67-71,共5页
Materials Science and Technology
关键词
铝合金
再结晶
形核
退火
aluminium alloy
recrystallization
nucleation
subgrain
