Effect of β/B2 phase on cavitation behavior during superplastic deformation of TiAl alloys

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• 作者：Liang Cheng^a ; Jinshan Li^a ; ^b ; ^{ljsh@nwpu.edu.cn} ; Xiangyi Xue^a ; ^b ; Bin Tang^a ; ^b ; Hongchao Kou^a ; ^b ; Olivier Perroud^c ; ^d ; Emmanuel Bouzy^c ; ^d ; ^{Emmanuel.bouzy@univ-lorraine.fr}
• 关键词：Titanium aluminides ; Superplasticity ; Cavitation ; X-ray tomography ; Grain boundary sliding ; β/B2 phase
• 刊名：Journal of Alloys and Compounds
• 出版年：2017
• 出版时间：5 February 2017
• 年：2017
• 卷：693
• 期：Complete
• 页码：749-759
• 全文大小：4588 K
• 卷排序：693

文摘

TiAl alloys with similar compositions but different constituents have been designed. Both β/B2-rich and β/B2-lean alloys shows impressive superplasticity at 1000 °C. The β/B2-rich alloy shows much larger cavity sizes than β/B2-lean alloy. Cavities in β/B2-rich alloy are more likely to elongate along the tensile axis. The cavity growth rate of γ-TiAl is much higher than that of ordinary alloys.