Simulation of martensitic microstructural evolution in zirconium

被引：51

作者：

Pinsook, U ^{[1
]}

Ackland, GJ ^{[1
]}

机构：

[1] Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.58.11252

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A twinned microstructure is frequently observed after a martensitic phase transition. In this paper we investigate the atomic-level processes associated with the twin formation in a model system, using a many-body potential parametrized to represent zirconium. Molecular-dynamics simulations of the martensitic phase transition from bce to hcp in zirconium show the evolution of a laminated twinned microstructure. Plastic deformation also occurs, creating basal stacking faults. The plastic deformation is such as to cause a relation of the twins. This alters the twinning angle to the 61.5 degrees angle of the low-energy (10 (1) over bar 1)(hcp) twins. These are thus identified as a cause of microscopic irreversibility in Che transition. [S0163-1829(98)01534-3].

引用

页码：11252 / 11257

页数：6

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