摘要
研究了Ｔｉ－４８Ａｌ双相合全在６００、８００℃下以不同压缩量（２％、８％、１５％、２０％）变形后的微观组织结构。试验结果表明，在高温下形变孪生同样是双相ＴｉＡｌ合金的重要变形机制，孪生系统为｛１１１｝＜１１２］．在高温下变形时，随着变形量的增加，不仅形变孪晶的数量增多，同时孪晶厚度显著增大。
In this papor the micrcotructure of Ti-48at%Al alloy deformed by compressionat 600℃ and 800℃ is studied. The compraseion strain is about 2%, 8%, 15%and20%. The result shows that mechanieal twinning plays an important role in deformation fortwo phase TiAl alloy. The twinning system is found to be {lll}<112]. The quantity ofmeehanical twins increases with deformation increasing and the mechanical twins can bedevelopod very thick at elevated temporature.
基金
山西省青年科学基金资助项目
