小形变轧制316L奥氏体不锈钢退火过程中Σ3~n晶粒团簇的特征

Character of Σ3~n Grain Cluster of 316L Austenitic Stainless Steel with Low Strain in Annealing

采用电子背散射衍射(EBSD)技术对经5%冷轧形变的316 L奥氏体不锈钢在随后高温退火过程中Σ3n晶粒团簇及其内部晶粒取向的演变进行了原位追踪。结果发现Brass({110}<112>),Copper({112}<111>),Br1{110}<111>和Goss{011}<100>取向(包括它们的几何变体)的晶粒在形变应力梯度作用下优先长大,这些晶粒取向大都符合Σ3n界面关系并趋于成长为大尺寸的Σ3n晶粒团簇。

The evolution of grain orientation within cluster of grains interfaced by ∑3n boundaries was in-situ traced in the 316L austenitic stainless steel treated by 5% cold rolling and subsequent high-temperature annealing by means of EBSD technology. The results show that oriented growth of Brass （{110} 〈 112〉）, Copper （{112} 〈 111 〉）, Brl {110} 〈 111〉 and G oss {011} 〈100〉 orientations （including their geometric variants） occurs under the driving force of strain gradient introduced by slight cold rolling. These grain orientations are related by ∑3n boundaries and their growth advantage are responsible for developing the large-sized ∑ 3n grain clusters.