摘要
研究了Ｔｉ－４８Ａｌ双相合金在室温下以不同压缩量（２％、８％、１５％、２０％）变形后的徽观组织结构。试验结果表明，形变挛生是双相ＴｉＡｌ合金的重要变形机制，孪生系统为｛１１１｝＜１１２］。随着变形量的增加，形变李晶数量增多，但即使经历较大变形，形变孪晶仍然很薄。理论分析表明，在有序Ｌｌ＿ｏ结构中，形变不可能导致伪孪晶。
This paper studies the microstructures of Ti-48Al alloy deformed incompression at room temperature. The compraseion strains are about 2%, 8%, 15% and20%. The result shows that mechanical twinnins plays an important role in deformation fortwo phase TiAl alloy. The twinning system is found to be {111}<112]. The quantity ofmechanical twins increases with the increase of strain, but it remains very thin at roomtemperature even after deforming at large strains. Theoretical analysis indicates that peudotwin can not be resulted from deformation for ordered L1_0 structure.
基金
山西省青年科学基金资助项目
