시효처리에 따른 Ti-13Nb-13Zr합금의 미세구조 변화와 부식특성

Abstract

This work describes the microstructure evolution and corrosion characteristics of Ti-13Nb-13Zr alloy. The specimens have been solution treated in the β phase and α＋β phase field and followed by water quenching(WQ), air cooling(AC), and furnace cooling(FC). The samples for optical metallography and scanning electron microscopy were prepared using standard techniques and etched with Kroll's reagent. X-ray diffraction(XRD) patterns of all specimens were taken using a Philips 3121 diffractomenter. Corrosion characteistics of its alloy on the corrosion resistance was studied by anodic polarization test. The β solution treatment and WQ results in the α´(hexagonal)martensite while the α＋β solution treatment and WQ leads to three-phase microstructures consisting of α´´, α and β. Only α＋β phase are observed under aged condition irrespective of the prior solution treatment conditions.