電解滲氫與熱處理探討Ti-6Al-4V合金之氫濃度分佈研究

本研究以Ti-6Al-4V合金於1N硫酸水溶液中添加0.1gAs203在室溫下進行電化學水溶液滲氫。先針對壓延-退火（mill-annealed；MA）與β相固溶處理（β-solution treated；BST）二種不同原材進行電解滲氫後，觀察其不同處理條件下表面結構及氫原子分佈情形。滲氫後結構變化是使用X光繞射儀（x-ray diffractometry；XRD），而氫濃度之定量分佈曲線則是藉由輝光放電質譜儀（glow discharge optical spectrometry；GDOS）分析得知。再對BST後板材進行循環電解滲氫及後續不同溫度熱處理方式，觀察每一循環表面結構及氫原子分佈情形，並利用掃描式電子顯微鏡（SEM）觀察試片表面形貌。實驗結果發現，經BST後試片滲氫濃度及深度明顯增加。BST後板材進行循環電解滲氫及後續不同溫度及熱處理方式，於熱處理下有明顯的結構變化、氫濃度分佈及表面形貌差異；其中又以不同溫度熱處理條件下，差異最明顯。

關鍵字

輝光放電光譜術； X光繞射術；循環滲氫-後續固溶處理； β-固溶處理； Ti-6Al-4V合金

並列摘要

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.

並列關鍵字

β-solution treatment ； Ti-6Al-4V ； cyclic hydrogenation-solution

參考文獻

[3]E. W. Collings: in“ Materials Properties Handbook: Titanium Alloy “, pp.

[4]Robert E. Reed–Hill. “ Physical Metallurgy Principles”, PWS Publishing

[6]G. R. Caskey. Jr. Mater. Sci. Eng., Vol. 14, p. 109, 1974.

p.73, 1995.

p.367, 1954.

國際替代計量

電解滲氫與熱處理探討Ti-6Al-4V合金之氫濃度分佈研究

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