A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Fatigue behavior of low-temperature hot isostatic pressed electron beam powder bed fusion manufactured Ti-6Al-4 V
Tekijät: Pandian K, Neikter M, Bahbou F, Ganvir A, Hansson T, Pederson R
Kustantaja: Elsevier Science
Julkaisuvuosi: 2023
Journal: Journal of Alloys and Compounds
Tietokannassa oleva lehden nimi: JOURNAL OF ALLOYS AND COMPOUNDS
Lehden akronyymi: J ALLOY COMPD
Artikkelin numero: 171086
Vuosikerta: 962
Sivujen määrä: 10
ISSN: 0925-8388
eISSN: 1873-4669
DOI: https://doi.org/10.1016/j.jallcom.2023.171086
Verkko-osoite: https://doi.org/10.1016/j.jallcom.2023.171086
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/180540575
Ti-6Al-4 V finds application in the fan and compressor modules of gas turbine engines due to its high specific strength. Ti-6Al-4 V components manufactured using one of the additive manufacturing (AM) techniques, the electron beam powder bed fusion (PBF-EB) process, has been an active area of research in the past decade. The fatigue life of such PBF-EB built Ti-6Al-4 V components is improved by hot isostatic pressing (HIP) treatment typically performed at about 920 C. The HIP treatment at 920 C results in coarsening of & alpha; laths and reduced static strength and therefore a low-temperature HIP treatment is performed at about 800 C to limit the impact on static mechanical properties. In the present work, the low cycle fatigue and fatigue crack growth behavior of such a modified HIP (low-temperature HIP) treated material is assessed and compared with the respective data for the standard HIP-treated material. The modified HIP-treated material has fatigue performance comparable to the standard HIP-treated material. This work suggests that the modified HIP treatment improves the static mechanical properties without significantly impacting the fatigue performance. Also, fatigue life predictions were made from the measured defect size at the crack initiation site using a linear elastic fracture mechanics tool. The life predictions show good agreement with the experimental values for defects greater than the intrinsic crack length, where life is well predicted by large-crack growth methodology.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
