Characterizing solute hydrogen and hydrides in pure and alloyed titanium at the atomic scale. (15th May 2018)

• Record Type: Journal Article
• Authors: Chang, Yanhong; Breen, Andrew J.; Tarzimoghadam, Zahra; Kürnsteiner, Philipp; Gardner, Hazel; Ackerman, Abigail; Radecka, Anna; Bagot, Paul A.J.; Lu, Wenjun; Li, Tong; Jägle, Eric A.; Herbig, Michael; Stephenson, Leigh T.; Moody, Michael P.; Rugg, David; Dye, David; Ponge, Dirk; Raabe, Dierk; Gault, Baptiste
• Is Part Of: Acta materialia. Volume 150(2018)
• Page Start: 273
• Page End: 280
• Publication Date: 2018-05-15
• Subjects: Ti-alloys -- Hydrogen -- Stable hydrides -- Atom probe tomography; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2018.02.064
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: Ti and its alloys have a high affinity for hydrogen and are typical hydride formers. Ti-hydride are brittle phases which probably cause premature failure of Ti-alloys. Here, we used atom probe tomography and electron microscopy to investigate the hydrogen distribution in a set of specimens of commercially pure Ti, model and commercial Ti-alloys. Although likely partly introduced during specimen preparation with the focused-ion beam, we show formation of Ti-hydrides along α grain boundaries and α/β phase boundaries in commercial pure Ti and α+β binary model alloys. No hydrides are observed in the α phase in alloys with Al addition or quenched-in Mo supersaturation. Graphical abstract: Image 1