Ce及Na,K对2090合金板材不同方向断裂韧性的影响  

Effects of Ce and Na, K on The Fracture Toughness in Different Directions for Alloy 20090 Plates

作　　者：耿东生[1] 孟亮[1] 高杨[1] 

机构地区：[1]西北工业大学,西安710072

出　　处：《稀有金属材料与工程》1993年第4期46-50,共5页Rare Metal Materials and Engineering

摘　　要：研究了微量Ce及(Na+K)杂质含量对2090合金板材不同方向的裂纹扩展阻力及断裂韧性的影响,探讨了其变化规律。结果表明:(Na+K)杂质含量控制在一定范围时,添加微量稀土元素ce可使不同方向的裂纹扩展阻力和断裂韧性有较大提高,断裂韧性的各向异性有所减小。当(Na+K)含量较高(120×10^(-4)%)时,2090合金板材不同方向的断裂韧性明显下降。Effects of trace Ce and (Na+K) impurities on the crack propagation resistance and the fracture toughness in different directions for alloy 2090 plates have been investigated. It was shown that the crack propagation resistance and the fracture toughness in different directions increase, and the anisotrogy of fracture toughness decrease, if the amount of (Na+K) impurity was controlled in a certain ranges and the trace Ce was added in the alloy. But the fracture toughness in different directions decrease sharply if the alloy contained (Na+K) more.

关 键 词：杂质 断裂韧性 铈 钠 钾 铝锂合金 

分 类 号：TG146.2[一般工业技术—材料科学与工程]