Texture, morphology and deformation mechanisms in β-transformed Zircaloy-4
Texture, morphology and deformation mechanisms in β-transformed Zircaloy-4
复制标题
β 相变 Zircloy-4 的织构、形貌和变形机制
DOI：
10.1016/0022-3115(96)00350-9
复制
发表时间：
1996
影响因子：
3.1
通讯作者：
M. Roth
中科院分区：
文献类型：
--
作者：
D. Ciurchea;A. Pop;C. Gheorghiu;I. Furtunǎ;M. Todică;A. Dinu;M. Roth
β(bcc)相变锆合金的形貌可视为透镜孪晶马氏体。织构是< 0001 > α、< 1010> α和< 1011> α方向向< 110> β方向退化的结果。微观贝恩应变调节的晶体机制为(10 10 10)< 11 20 >棱镜滑移、(10 12 2)< 10 11 11 >孪晶和(10 11 11)< 10 12 >孪晶。这种退化解释了显微镜下观察到的“平行板”和“篮织”形态和β转化管的结构。计算了宏观贝恩应变，与尺寸测量结果吻合。从新的织构和变形实验中确定β转化锆合金-4的变形机制为孪生和血小板间滑动。血小板间滑动在“平行板”形态中诱发脆性断裂。
The morphology of the β(bcc) transformed Zircaloy-4 may be treated as a lenticular-twinned martensite. The texture is a consequence of the degeneration of the 〈0001〉α, 〈10 1 0〉αand 〈10 1 1〉αdirection into 〈110〉βdirections. The crystallographic mechanisms implied in the accommodation of the microscopic Bain strain are (10 1 0)〈11 2 0〉 prism slip, (10 1 2)〈10 1 1〉 twinning and (10 1 1)〈10 1 2〉 twinning. This degeneration explains the ‘parallel plate’ and ‘basketweave’ morphologies observed by microscopy and the texture of the β transformed tube. The macroscopic Bain strain was calculated and agrees with the dimensional measurements. The deformation mechanisms of β transformed Zircaloy-4 are identified from the new texture and from deformation experiments as twinning and interplatelet glide. The interplatelet glide induces a fragile character of fracture in the ‘parallel plate’ morphology.