Ti-45Al合金的定向凝固组织

稀有金属材料与工程, 2005, 34(5): 768-772.

Ti-45Al合金的定向凝固组织

苏彦庆 ^1, , 刘畅 ^2, , 毕维生 ^3, , 丁宏升 ^4, , 李邦盛 ^5, , 关兴举 ^6, , 郭景杰 ^7, , 贾均 ^8, , 傅恒志 ^9,

1.哈尔滨工业大学,黑龙江,哈尔滨,150001

2.哈尔滨工业大学,黑龙江,哈尔滨,150001

3.哈尔滨工业大学,黑龙江,哈尔滨,150001

4.哈尔滨工业大学,黑龙江,哈尔滨,150001

5.哈尔滨工业大学,黑龙江,哈尔滨,150001

6.吉林工业职业技术学院,吉林,吉林,132013

7.哈尔滨工业大学,黑龙江,哈尔滨,150001

8.哈尔滨工业大学,黑龙江,哈尔滨,150001

基金项目: 国家自然科学基金(50271020,50395102)

关键词： Ti-45Al合金 , 定向凝固 , 胞晶 , 片层

Directionally Solidified Microstructures of Ti-45Al Alloy

采用区域重熔定向凝固技术制备了Ti-5Al合金定向凝固试样,研究了不同参数下的凝固组织.结果表明,该合金在定向凝固过程中一次凝固可以以胞晶形式实现定向生长,胞晶内α2/y片层方向与生长方向成45°或90°.凝固过程中稳定相β及亚稳相α同时存在,并以胞状生长,存在竞争而引起的交替现象.降速生长时定向组织比较理想.淬火实验表明,在大过冷度下亚稳α相作为领先相析出.

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Ti-45Al合金的定向凝固组织

Directionally Solidified Microstructures of Ti-45Al Alloy

参考文献