Stacking faults in Zr(Fe, Cr)2 Laves structured secondary phase particle in Zircaloy-4 alloy,Nanoscale

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Stacking faults in Zr(Fe, Cr)2 Laves structured secondary phase particle in Zircaloy-4 alloy
Nanoscale ( IF 5.8 ) Pub Date : 2017-12-28 00:00:00 , DOI: 10.1039/c7nr08963e
Chengze Liu _{1,

2,

3,

4,

5} , Geping Li _{1,

2,

3,

4} , Fusen Yuan _{1,

2,

3,

4,

5} , Fuzhou Han _{1,

2,

3,

4,

5} , Yingdong Zhang _{1,

2,

3,

4,

5} , Hengfei Gu _{1,

2,

3,

4,

6}

Affiliation

Stacking faults (SFs) in secondary phase particles (SPPs), which generally crystallize in the Laves phase in Zircaloy-4 (Zr-4) alloy, have been frequently observed by researchers. However, few investigations on the nano-scale structure of SFs have been carried out. In the present study, an SF containing C14 structured SPP, which located at grain boundaries (GBs) in the α-Zr matrix, was chosen to be investigated, for its particular substructure as well as location, aiming to reveal the nature of the SFs in the SPPs in Zr-4 alloy. It was indicated that the SFs in the C14 structured SPP actually existed in the local C36 structured Laves phase, for their similarities in crystallography. The C14 → C36 phase transformation, which was driven by synchroshearing among the (0001) basal planes, was the formation mechanism of the SFs in the SPPs. By analyzing the strained regions near the SPP, a model for understanding the driving force of the synchroshear was proposed: the interaction between SPP and GB resulted in the Zener pinning effect, leading to the shearing parallel to the (0001) basal planes of the C14 structured SPP, and the synchroshear was therefore activated.

中文翻译：

Zircaloy-4合金中Zr（Fe，Cr）₂ Laves结构次级相粒子的堆垛层错

研究人员经常观察到通常在Zircaloy-4（Zr-4）合金的Laves相中结晶的二次相颗粒（SPPs）中的堆垛层错（SFs）。然而，关于SF的纳米级结构的研究很少。在本研究中，选择了一种含C14结构SPP的SF，它位于α-Zr基质中的晶界（GBs），因为其特定的亚结构和位置，旨在揭示SF的性质。在Zr-4合金中的SPP中。结果表明，C14结构SPP中的SF实际上存在于局部C36结构Laves相中，这是由于它们在晶体学上的相似性。通过（0001）基面之间的同步剪切驱动的C14→C36相变是SPP中SF的形成机理。

更新日期：2017-12-28

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