Unveiling the correlation between anomalous hardening and grain boundary diffusional transformation in ω single-phase nano-grained Ti-Fe alloy

Wu S.; Kou Z.; Tang S.; Lan S.; Lai Q.; Wang J.; Luo J.; Xie X.; Huang R.; Zheng G.; Wilde G.; Feng T.

Forschungsartikel (Zeitschrift) | Peer reviewed

Zusammenfassung

A metastable ω single-phase nanograined (NG) Ti-Fe alloy was synthesized using laser inert-gas condensation (IGC). Upon being annealed at 360 °C, the NG Ti-Fe alloy exhibited a remarkable ultra-hardening, increasing the hardness from 4.7 to 8.6 GPa. Subsequent findings revealed an unexpected hardness enhancement, rising from 6.6 GPa at 420 °C to 7.6 GPa at 460 °C, despite the occurrence of grain growth. In-depth investigations into the strengthening mechanisms of the NG Ti-Fe alloy were conducted using in-situ synchrotron high-energy X-ray diffraction (XRD) and transmission electron microscopy (TEM). The comprehensive analysis unveiled that the diffusion-controlled structure evolution during annealing played a pivotal role in enhancing the alloy's mechanical properties. This study not only presents the synthesis of a novel metastable alloy but also provides valuable insights into the intricate relationship between diffusion-controlled structure evolution and the resulting superior mechanical properties.

Details zur Publikation

FachzeitschriftJournal of Materials Science and Technology
Jahrgang / Bandnr. / Volume203
Seitenbereich53-60
StatusVeröffentlicht
Veröffentlichungsjahr2024
Sprache, in der die Publikation verfasst istEnglisch
DOI10.1016/j.jmst.2024.01.099
Link zum Volltexthttps://api.elsevier.com/content/abstract/scopus_id/85192503827
StichwörterDislocations; Laser-inert gas condensation; Nanograined Ti-Fe alloy; Phase transformation; Strengthening

Autor*innen der Universität Münster

Wilde, Gerhard
Professur für Materialphysik (Prof. Wilde)