000086480 001__ 86480 000086480 005__ 20230126102836.0 000086480 0247_ $$2doi$$a10.1016/j.matdes.2019.108251 000086480 0248_ $$2sideral$$a114714 000086480 037__ $$aART-2020-114714 000086480 041__ $$aeng 000086480 100__ $$aChen, Fuwen 000086480 245__ $$aImproved fracture toughness by microalloying of Fe in Ti-6Al-4V 000086480 260__ $$c2020 000086480 5060_ $$aAccess copy available to the general public$$fUnrestricted 000086480 5203_ $$aThe widely used Ti–6Al–4V (TC4) titanium alloy has been modified through the micro-alloying of Fe. The microstructural features and mechanical properties of the designed alloy, TC4F, are compared with other alloys in Ti–6Al–4V class by combining experimental characterizations and thermodynamic calculations. TC4F alloy not only maintains strength, hardness, and elongation similar to baseline TC4 but also exhibits improved fracture toughness comparable to TC4_ELI and even superior to TC4_DT under the heat-treated condition. It opens up a new cost-reducing way to enhance fracture toughness in place of controlling interstitial contents, showing potential in engineering applications. The discerned mechanisms indicate that the trace addition of Fe gives rise to composition redistribution between V and Fe in the ß phase, boosts the lattice distortion and vibration, thereafter enhances Young''s modulus and fracture toughness. It has been validated and verified by experiments, thermodynamic calculations, and Hahn-Rosenfield empirical research. The enhanced fracture toughness also benefits from the kinked ß+a lamellar microstructure at crack tip as well as the improved fracture surface due to the Fe addition. The enlarged plastic zone, redirected crack propagation, and more dimples with even-distributed size additionally contribute to the improvement of fracture toughness. 000086480 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/ 000086480 590__ $$a7.991$$b2020 000086480 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b58 / 333 = 0.174$$c2020$$dQ1$$eT1 000086480 592__ $$a1.842$$b2020 000086480 593__ $$aMaterials Science (miscellaneous)$$c2020$$dQ1 000086480 593__ $$aMechanics of Materials$$c2020$$dQ1 000086480 593__ $$aMechanical Engineering$$c2020$$dQ1 000086480 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000086480 700__ $$aGu, Yulei 000086480 700__ $$aXu, Guanglong 000086480 700__ $$0(orcid)0000-0001-6971-2047$$aCui, Yuwen 000086480 700__ $$aChang, Hui 000086480 700__ $$aZhou, Lian 000086480 773__ $$g185 (2020), 108251 [14 pp.]$$tMATERIALS & DESIGN$$x0264-1275 000086480 85641 $$uhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85072898237&doi=10.1016%2fj.matdes.2019.108251&partnerID=40&md5=578b0eab27c71534f6168a3943780c13$$zTexto completo de la revista 000086480 8564_ $$s8400428$$uhttps://zaguan.unizar.es/record/86480/files/texto_completo.pdf$$yVersión publicada 000086480 8564_ $$s98986$$uhttps://zaguan.unizar.es/record/86480/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000086480 909CO $$ooai:zaguan.unizar.es:86480$$particulos$$pdriver 000086480 951__ $$a2023-01-26-09:53:55 000086480 980__ $$aARTICLE