论文标题
\ b {eta}口袋的作用是由钛中的氢化物形成中的Fe杂质产生的
The role of \b{eta} pockets resulting from Fe impurities in hydride formation in titanium
论文作者
论文摘要
NaCl溶液中商业上纯钛的腐蚀潜力受到痕量添加的影响，这会导致晶粒边界三重点\ b {eta}相的亚微米袋的出现。此外，由于应力腐蚀破裂，氢在六角形闭合α-Ti中的低溶解度使钛合金容易导致随后与氢化物相关的失败。我们分析了A \ b {eta}口袋的基于2级CP-TI和α-\ b {eta}相边界的α-\ b {eta}部分。 fe和h的分区为\ b {eta}并在晶界分离，但在α-\ b {eta}相边界处没有看到隔离。相反，在α-\ b {eta}相边界处观察到显着的Ni（> 1 at％）积累。我们建议\ b {eta} - 口袋充当氢气陷阱，并促进CP-TI沿晶界的氢化物的成核和生长。
The corrosion potential of commercially pure titanium in NaCl solutions is dramatically affected by trace Fe additions, which cause the appearance of submicron pockets of \b{eta} phase at grain boundary triple points. Furthermore, the low solubility of hydrogen in hexagonal close-packed α-Ti makes titanium alloys prone to subsequent hydride-associated failures due to stress corrosion cracking. We analyzed α-α and α-\b{eta} sections of the abutting grain boundary of a \b{eta} pocket in a Grade 2 CP-Ti, and the α-\b{eta} phase boundary. Fe and H partition to \b{eta} and segregate at the grain boundary, but no segregation is seen at the α-\b{eta} phase boundary. In contrast, a significant Ni (>1 at%) accumulation is observed at the α-\b{eta} phase boundary. We propose that the \b{eta}-pockets act as hydrogen traps and facilitate the nucleation and growth of hydrides along grain boundaries in CP-Ti.
