高纯钼板断口形貌和组织分析  

Fracture and Structure Analysis of Pure Molybdenum Plate

作　　者：陈程[1] 尹海清[1] 曲选辉[1] 

机构地区：[1]北京科技大学材料科学与工程学院新金属材料国家重点实验室,北京100083

出　　处：《稀有金属》2007年第1期10-13,共4页Chinese Journal of Rare Metals

基　　金：国家973计划(2006CB605207);国家自然科学基金重点项目(50634010);教育部长江学者和创新团队发展计划(I2P407)资助项目

摘　　要：对通过不同锻造和轧制工艺制备的高纯钼板的拉伸力学性能、显微组织和断口形貌进行了分析。确定了不同工艺条件下高纯钼板的组织变化情况和抗拉强度。结果表明:纤维状组织的高纯钼板具有良好的室温韧性,其断裂表现为准解理断裂;若经过回复和再结晶,纤维组织转化成等轴晶粒组织,则材料呈现脆性,其断裂表现为穿晶解理断裂和沿晶脆性断裂的混合型断裂。The mechanical properties, microstructure and fracture of the pure molybdenum plate were analyzed under different forging and rolling conditions, by which obtained the structure changing conditions and tensile strength for pure molybdenum plate. Results showed that pure molybdenum plate with the fibrous microstructures possessed a good quality of ductility,and its fracture behavior was quasi-cleavage fracture. When some of fibrous microstructures changed into equiaxed grains microstructures through recovering and recrystallization, the materials turned from ductile to brittle. And its fracture behavior was mixed fracture made up of brittle intergranular fracture and cleavage fracture.

关 键 词：高纯钼板 力学性能 准解理断裂 穿晶解理断裂 沿晶脆性断裂 

分 类 号：TG146[一般工业技术—材料科学与工程]