• search hit 7 of 16
Back to Result List

Microstructure and mechanical properties of a forged β-solidifying γ TiAl alloy in different heat treatment conditions

  • In the cast condition g titanium aluminide alloys that solidify completely through the b phase are characterized by fine and homogeneous microstructures, weak textures and low segregation. For these reasons such alloys have a relatively good workability and can be closed-die forged without preceding ingot breakdown even if the alloys contain no large fractions of the b phase at the working temperature. The present work was devoted to a combined study of the constitution and microstructural morphologies that develop in various two-step heat treatments of a single-step forged b solidifying alloy. The study included high-energy X-ray diffraction for in situ investigations of the constitution at the heat treatment temperature. It was observed that the phase ransformations are quite sluggish in the material which results in fine microstructures and some conditions that significantly deviate from thermodynamic equilibrium. Further, tensile and creep testing was carried out on the different material conditions in order to identify theIn the cast condition g titanium aluminide alloys that solidify completely through the b phase are characterized by fine and homogeneous microstructures, weak textures and low segregation. For these reasons such alloys have a relatively good workability and can be closed-die forged without preceding ingot breakdown even if the alloys contain no large fractions of the b phase at the working temperature. The present work was devoted to a combined study of the constitution and microstructural morphologies that develop in various two-step heat treatments of a single-step forged b solidifying alloy. The study included high-energy X-ray diffraction for in situ investigations of the constitution at the heat treatment temperature. It was observed that the phase ransformations are quite sluggish in the material which results in fine microstructures and some conditions that significantly deviate from thermodynamic equilibrium. Further, tensile and creep testing was carried out on the different material conditions in order to identify the range in which the properties can be varied. It is found that this easily forgeable material exhibits comparable strength, ductility and creep strength as more conventional peritectically solidifying alloys.show moreshow less

Export metadata

Additional Services

Search Google Scholar
Metadaten
Author: Michael Oehring, Janny Lindemann, Florian Pyczak, Jonathan Paul, Andreas Stark, Thomas Lippmann, Susanne Schrüfer, Dan Roth-Fagaraseanu, Andreas Schreyer, Sabine WeißORCiDGND
URL:http://www.sciencedirect.com/science/article/pii/S096697951400301X
DOI:https://doi.org/10.1016/j.intermet.2014.11.008
ISSN:0966-9795
Title of the source (English):Intermetallics
Contributor(s): Grit Rodenbeck, Birgit Kunze, Rainer Konzack, Dieter Domke
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2015
Tag:TNB-V4; TiAl; Titanium Aluminides; hot die forging
Volume/Year:2015
Issue number:58
First Page:71
Last Page:83
Faculty/Chair:Fakultät 3 Maschinenbau, Elektro- und Energiesysteme / FG Metallkunde und Werkstofftechnik
Institution name at the time of publication:Fakultät für Maschinenbau, Elektrotechnik und Wirtschaftsingenieurwesen (eBTU) / LS Metallkunde und Werkstofftechnik
Einverstanden ✔
Diese Webseite verwendet technisch erforderliche Session-Cookies. Durch die weitere Nutzung der Webseite stimmen Sie diesem zu. Unsere Datenschutzerklärung finden Sie hier.