A Study on Hydrogen Distribution of Ti-6Al-4V Alloy by Electrolytic Cathodic Charging and Heat Treatment

• Main Authors: Jing-Fu Jhuang, 莊景富
• Other Authors: Jiann-Kuo Wu
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/21532503707846322413

碩士 === 大同大學 === 材料工程學系(所) === 97 === Ti-6Al-4V sheet specimen were cathodically charged at 50mA/cm2 for 3 hours in 1N H2SO4(aq) adding with 0.1g/L As2O3 at room temperature . Both of the MA（mill-annealed）and BST（β-solution treated）sheets were designed cathodic charging to evaluate the effect of various designed parameters on the surface microstructure change and hydrogen redistribution. The variation of microstructure was investigated by using XRD（x-ray diffractometry）and hydrogen redistribution was examined by GDOS（glow discharge optical spectrometry）.The BST specimens were processed through cyclic cathodic charging and subsequent various heat-treatment to observe the surface microstructure change. The depth of hydrogen were sharply increase by BST. The BST specimens were processed through cyclic cathodic charging and subsequent various heat-treatment to observe on the surface microstructure change, hydrogen redistribution and surface morphology. The different temperature and charging condition were performed systematically to evaluate the optimal parameters.