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Исследование особенностей пластической деформации сплавов систем Ti – Nb и Ti – Ta методом молекулярной динамики
Аннотация
Методом молекулярно-динамического моделирования исследована эволюция фазового состава и дислокационной структуры при одноосном растяжении вдоль направления [100] β-титановых сплавов. Показано, что пластическая деформация сплавов происходит в четыре основных этапа: формирование точечных дефектов, формирование дефектов упаковки, двойникование и скольжение дислокаций. Повышение концентрации легирующих элементов приводит к увеличению предела текучести и модуля упругости сплавов. Система Ti – Ta демонстрирует более высокие значения модуля упругости в сравнении с системой Ti – Nb. Наибольший вклад в дислокационную структуру сплавов оказывают дислокации с вектором Бюргерса 1/2<111>. Увеличение скорости деформации способствует повышению степени двойникования и уменьшению плотности дислокаций в структуре сплавов.
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Литература
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DOI: https://doi.org/10.30906/mitom.2026.8.41-42
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