冷却速率及杂质元素对锆合金β→α转变组织的影响

稀有金属材料与工程, 2013, 42(12): 2636-2640.

冷却速率及杂质元素对锆合金β→α转变组织的影响

1.重庆大学,重庆400044

2.重庆大学,重庆400044

3.重庆大学,重庆400044

4.西北有色金属研究院,陕西西安710016

基金项目: 教育部新世纪优秀人才支持计划(NCET-08-0606) 重庆大学大学生科研训练计划(CQU-SRTP-2011354) 中央高校基本科研业务费专项资金(CDJXS10132201) 重庆大学大型仪器设备开放基金(2011121507)

关键词：锆合金 , 冷却速率 , 马氏体 , 魏氏组织 , 杂质元素

Effect of Cooling Rates and Impurities on the Microstructure of β→a Transformation in Zr Alloys

Luan Baifeng ^1, , Xue Jiaojiao ^2, , Chai Linjiang ^3, , Zhou Jun ^4,

1.重庆大学,重庆400044

2.重庆大学,重庆400044

3.重庆大学,重庆400044

4.西北有色金属研究院,陕西西安710016

Keywords： zirconium alloys , cooling rates , Martensite , Wadmanstatten , impurity elements

锆合金β相冷却组织对于发展高性能燃料包壳具有至关重要的作用.本工作从冷却速率和杂质元素两个影响因素出发,对核反应堆用锆合金β→α转变组织的相关研究进行了综述.锆合金的马氏体转变为无扩散的切变过程,不产生表面浮凸,Ms不随冷却速率变化.成分相同时,随着β冷却速率的增加,锆合金微观结构按如下次序变化:Lenticular组织→Parallel-plate魏氏组织→Basketweave魏氏组织→马氏体.相同冷却速率下,当杂质元素参与形成难溶的第二相时,会促进Basketweave组织的形成,而当这些元素提高β转变温度时,则倾向于促进Parallel-plate组织的形成.

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