锆合金管材加工过程中的织构研究  

Research Progress of Texture Developments during Fabrication of Zirconium Alloy Tube

作　　者：周宇[1] 栾佰峰[1] 贾明星[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《材料导报（网络版）》2011年第4期4-9,共6页Materials Review

摘　　要：以典型材料（Zr-25Nb、ziraloy）为例，总结分析了α＋β两相和α单相锆合金管材加工过程中的织构研究情况，重点对其织构特点及形成原因进行了阐述。结果表明，两相区轧制的Zr-2.5Nb管材主要为横向基面织构，这与大量存在的连续β相有关，单相区轧制的zircaloy管材的织构随减壁减径比（Q值）的不同而变化。这取决于不同主压应力所对应开启的不同的孪生及滑移系统。The texture development cluring the fabrication steps of α＋β two-phase and α single-phase zirconium alloy tubes is reviewed. By concentrating on typical materials （Zr-2.5Nb and zircaloy）, it has elaborated on the texture characteristics and formation mechanism. It is reported that the basal poles align preferentially in the transverse direction of the Zr-2.5Nb tube, clue to the existence of continuous secondary phase（J3） along α grain bomldary. Systematic investigations in zircaloy tube show that the determining factor controlling the texture development is the Q parameter （Q=RW/RD; RW is reduction in wall thickness ; RD is reduction in diameter）. The variation of textures is ascribed to the activation of the different slips and twins which are affected by different effective compressive force.

关 键 词：锆合金管材 织构 Zr-2.5Nb ZIRCALOY 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]