ABSTRACT

In contrast to lamella-like face-centered cubic zirconium (FCC-Zr) distributed inside an α-Zr matrix, as repeatedly reported previously, dispersed and nanoscale FCC-Zr with lattice parameter a = 0.520 nm has been found inside lamella-like and blocky ω-Zr by transmission electron microscopy (TEM). The orientation relationship between the FCC-Zr and the ω-Zr obeys [001]_FCC//[1$\overline{1}$02]_ω, (100)_FCC//(11$\overline{2}$0)_ω. A possible phase transformation mechanism between FCC-Zr, α-Zr and β-Zr is discussed. This finding introduces a new possibility in phase transformations during the fabrication of Zr alloys, potentially enlightening the design of new high-performance Zr alloys.

摘要

与分布在 α-Zr 基质内的片状面心立方锆 (FCC-Zr) 相比，如先前反复报道的那样， 在片状和通过透射电子显微镜（TEM）观察到块状 ω-Zr。FCC-Zr和ω-Zr的取向关系服从[001] _FCC //[1$\overline{1}$02] _ω , (100) _FCC //(11$\overline{2}$0) _ω。讨论了FCC-Zr、α-Zr和β-Zr之间可能的相变机制。这一发现为 Zr 合金制造过程中的相变引入了新的可能性，可能会启发新型高性能 Zr 合金的设计。