Методом ориентационной микроскопии (EBSD) исследованы текстурные состояния сплава Ti-6Al-4V, изготовленного методом селективного электронно-лучевого плавления (СЭЛС). Установлено, что текстура β-фазы представлена текстурой кристаллизации, при которой направление <100>β параллельно направлению синтеза изделия. Текстура α-фазы является многокомпонентной и наследует текстуру β-фазы через ОС Бюргерса. Показано, что при последующем охлаждении в сплаве Ti-6Al-4V выделяется вторичная βII-фаза, кристаллографически отличная от высокотемпературной β-фазы. Предложена схема протекающих фазовых превращений. / The textural states of the Ti-6Al-4V alloy fabricated by a method of electron beam melting (EBM) were studied by orientation microscopy (EBSD). It was found that the texture of the β-phase is represented by the texture of crystallization, where the direction <100>β is parallel to the building direction. The texture of the α-phase is multicomponent and inherits the texture of the β-phase following the Burgers OR. It was shown that upon subsequent cooling in the Ti-6Al-4V alloy, a secondary βII-phase is precipitated, which is crystallographically different from the high-temperature β-phase. A scheme of the ongoing phase transformations is proposed.

Though ferroelectric HfO₂ thin films are now well characterized, little is currently known about their grain substructure. In particular, the formation of domain and phase boundaries requires investigation to better understand phase stabilization, switching, and phase interconversion. Here, scanning transmission electron microscopy is applied to investigate the atomic structure of boundaries in these materials. It is found that orthorhombic/orthorhombic domain walls and coherent orthorhombic/monoclinic interphase boundaries form throughout individual grains. The results inform how interphase boundaries can impose strain conditions that may be key to phase stabilization. Moreover, the atomic structure near interphase boundary walls suggests potential for their mobility under bias, which has been speculated to occur in perovskite morphotropic phase boundary systems by mechanisms similar to domain boundary motion.