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Elevated-Temperature Tensile Properties of Low-Temperature HIP-Treated EBM-Built Ti-6Al-4V.
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0003-3772-4371
GE Additive, 435 33 Molnlycke (SWE).
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. GKN Aerospace Engine Systems, 461 38 Trollhattan, (SWE). (PTW)ORCID iD: 0000-0001-7991-6369
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2022 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 15, no 10, article id 3624Article in journal (Refereed) Published
Abstract [en]

Evaluation of the high-temperature tensile properties of Ti-6Al-4V manufactured by electron beam melting (EBM) and subjected to a low-temperature hot isostatic pressing (HIP) treatment (800 °C) was performed in this study. The high-temperature tensile properties of as-built and standard HIP-treated (920 °C) materials were studied for comparison. Metallurgical characterization of the as-built, HIP-treated materials was carried out to understand the effect of temperature on the microstructure. As the HIP treatments were performed below the β-transus temperature (995 °C for Ti-6Al-4V), no significant difference was observed in β grain width between the as-built and HIP-treated samples. The standard HIP-treated material measured about 1.4×-1.7× wider α laths than those in the modified HIP (low-temperature HIP)-treated and as-built samples. The standard HIP-treated material showed about a 10-14% lower yield strength than other tested materials. At 350 °C, the yield strength decreased to about 65% compared to the room-temperature strength for all tested specimens. An increase in ductility was observed at 150 °C compared to that at room temperature, but the values decreased between 150 and 350 °C because of the activation of different slip systems.

Place, publisher, year, edition, pages
MDPI, 2022. Vol. 15, no 10, article id 3624
Keywords [en]
Ti-6Al-4V, additive manufacturing, electron beam melting, elevated temperature tensile strength, high-temperature mechanical properties, hot isostatic pressing
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-18442DOI: 10.3390/ma15103624ISI: 000801377700001PubMedID: 35629650Scopus ID: 2-s2.0-85130891800OAI: oai:DiVA.org:hv-18442DiVA, id: diva2:1707321
Funder
Vinnova, 2019-02741
Note

This research was funded by VINNOVA, through the “Nationella flygtekniska forskningsprogrammet7” (NFFP) (project #: 2019-02741).

Available from: 2022-10-31 Created: 2022-10-31 Last updated: 2022-10-31

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Thalavai Pandian, KarthikeyanNeikter, MagnusHansson, ThomasPederson, Robert

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