马氏体Cr钢亚晶结构的定量表征  

Quantitative Characterization of Subgrain Structure of Martensitic Cr Steel

作　　者：赵晴[1] 秦勇[2] 朱晓光[2] 冯长杰[1] 

机构地区：[1]南昌航空大学材料科学与工程学院,南昌330063 [2]中科院固体物理研究所中科院材料物理重点实验室,合肥230031

出　　处：《航空材料学报》2009年第6期81-84,共4页Journal of Aeronautical Materials

基　　金：航空科学基金(2007ZF56014)

摘　　要：利用透射电镜(TEM)对不同蠕变态的马氏体Cr钢亚晶结构进行了定量表征,得到了不同蠕变态的亚晶尺寸分布曲线,分析了蠕变过程中亚晶结构的变化特征,以及这些变化对显微硬度的影响。结果表明:高应力蠕变,亚晶粗化较小,而低应力蠕变,亚晶粗化显著;蠕变态的亚晶尺寸与硬度之间满足Hall-Petch关系,亚晶粗化引起硬度下降。Quantitative characterization of the martensitic Cr steel subgrain was conducted by TEM under different crept states. The crept subgrain＇ size distribution and their microstructure, as well as their effects on the microhardness were investigated. The resulta show that the subgrain of the martensitic Cr steel are coarsened under high stress creep, and more coarsened under low stress creep. The coarsened subgrain structure in the crept steel decreased their mierohardness and their relationship obeyed the Hall-Pctch formula.

关 键 词：马氏体Cr钢 蠕变 亚晶结构 定量表征 

分 类 号：TG142.24[一般工业技术—材料科学与工程]