粉末冶金技术2025，Vol.43Issue(5)：525-536,12.DOI:10.19591/j.cnki.cn11-1974/tf.2024050020
铪对增材制造高强镍基高温合金裂纹形成、组织及高温力学性能影响的研究进展
Research progress of hafnium effects on cracking formation,microstructure,and high-temperature mechanical properties of high-strength nickel-based superalloys prepared by additive manufacturing
摘要
Abstract
Nickel-based superalloys have the outstanding load-bearing and high-temperature resistance properties,which are widely used as the key structural materials for the hot-end components of aerospace equipment.However,the traditional high-strength nickel-based superalloys are prone to the crack formation characterized by strong constraints and rapid non-equilibrium solidification during additive manufacturing process,severely limiting the application.The non-equilibrium segregation of key alloying elements at the end of solidification is the main factor affecting crack formation.For the typical difficult-to-print γ'-strengthened nickel-based superalloys(CM247LC),the hafnium element(Hf)has significant impact on the solid-liquid phase line temperature difference.The distribution characteristics and crack sensitivity influence of Hf element in additive manufacturing nickel-based superalloys were analyzed in this paper,the influence of Hf element on the microstructure evolution of typical high-strength nickel-based superalloys was discussed during heat treatment,and the effect of Hf element on the high-temperature mechanical properties of high-strength nickel-based superalloys in additive manufacturing was summarized.关键词
增材制造/镍基高温合金/裂纹/高温力学性能/Hf元素Key words
additive manufacturing/nickel-based superalloys/cracks/high-temperature mechanical properties/hafnium element分类
矿业与冶金引用本文复制引用
张维,胡斌,胡明磊,贺星,戴坤杰,倪晓晴,张亮,孔德成,董超芳..铪对增材制造高强镍基高温合金裂纹形成、组织及高温力学性能影响的研究进展[J].粉末冶金技术,2025,43(5):525-536,12.基金项目
国家自然科学基金资助项目(52301060) （52301060）
中国科协青年人才托举工程资助项目(2022QNRC001) （2022QNRC001）
