| AN IN SITU STUDY ON DEFORMATION TWINNING NEAR CRACK TIP IN TWO－PHASE TiAl－BASE ALIOY |
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| 引用本文： | W Liang￣,,Q. Li￣ and D.ZYang￣.AN IN SITU STUDY ON DEFORMATION TWINNING NEAR CRACK TIP IN TWO－PHASE TiAl－BASE ALIOY[J].金属学报(英文版),1996,9(4):272-278. |
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| 作者姓名： | W Liang￣ Q. Li￣ and D.ZYang￣ |
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| 作者单位： | Centre of Measuring and Testing Taiyuan University of Technology，Taiyuan 030024，China Institute of Materials Science and Engineering，Harbin Institute of Technology，Harbin 150001 China |
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| 摘 要： | ＡＮＩＮＳＩＴＵＳＴＵＤＹＯＮＤＥＦＯＲＭＡＴＩＯＮＴＷＩＮＮＩＮＧＮＥＡＲＣＲＡＣＫＴＩＰＩＮＴＷＯ－ＰＨＡＳＥＴｉＡｌ－ＢＡＳＥＡＬＩＯＹＷＬｉａｎｇ￣１，２），Ｑ．Ｌｉ￣２）ａｎｄＤ．ＺＹａｎｇ￣２）（ＣｅｎｔｒｅｏｆＭｅａｓｕｒｉｎｇａｎｄＴ...
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| 收稿时间： | 1996-08-25 |
| 修稿时间： | 1996-08-25 |
AN IN SITU STUDY ON DEFORMATION TWINNING NEAR CRACK TIP IN TWO-PHASE TiAl-BASE ALIOY |
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| W Liang,Q. Li and D.ZYang.AN IN SITU STUDY ON DEFORMATION TWINNING NEAR CRACK TIP IN TWO-PHASE TiAl-BASE ALIOY[J].Acta Metallurgica Sinica(English Letters),1996,9(4):272-278. |
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| Authors: | W Liang Q Li and DZYang |
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| Abstract: | An in situ study of twinning at crack tip in a TiAl-base alloy has been performed.The result shows that twinning with long shear vector(2/6) 112] can generate on(111) plane, even though usually it is very difficult to occur because of the high energy barrier. It was further shown that (1/6) 112](111) twinning is considerably easier to generate. Furthermore,(1/2)<110) ordinary dislocations were very active and dominated nearly the whole plastic zone, in spite of low Schmid factors. On the other hand, however <101) and (1/2) <112] superdislocations with higher Schmid factors can hardly be observed. |
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| Keywords: | TiAl-base alloy deformation twinning crack propagation |
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