<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>30285</id>
    <completedYear/>
    <publishedYear>2022</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue>5</issue>
    <volume>12</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2023-02-04</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Influence of Nb, Ta and Zr on the Interdiffusion Coefficients and Solid Solution Strengthening of γ-TiAl Single Phase Alloys</title>
    <abstract language="eng">The alloying elements Nb, Ta and Zr improve the creep properties of fully lamellar γ/α2 titanium aluminides significantly. Since high temperature deformation mainly occurs in the γ-phase of γ/α2 titanium aluminides, the diffusivity and the solid solution hardening effect of these three elements in the γ-phase is studied by analyzing the concentration gradients of the alloying elements and the resulting hardness across the interdiffusion zone of diffusion couples by energy dispersive X-ray diffraction and nanoindentation. The results reveal that Zr has the highest interdiffusion coefficient but also the largest solid solution hardening coefficient. The mechanical properties of single γ-phase Ti-54Al-5X alloys were investigated by strain rate jump tests. The addition of 5 at.% Nb or Ta lead to an increased strength compared to a binary γ-Ti-54Al alloy. The Zr-containing γ-TiAl alloy reveals the highest strength at 750°C and 900°C, which is discussed to be due to the strong solid solution hardening effect of Zr. However, in comparison to the other alloys, Ti-54Al-5Zr shows quite brittle behavior up to 900°C. The lower diffusivity of Ta compared to Nb leads to a higher strength of the Ta-modified alloy at 900◦C.</abstract>
    <parentTitle language="eng">Metals</parentTitle>
    <identifier type="doi">10.3390/met12050752</identifier>
    <identifier type="issn">2075-4701</identifier>
    <enrichment key="BTU">nicht an der BTU erstellt / not created at BTU</enrichment>
    <enrichment key="Artikelnummer">752</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="Publikationsweg">Open Access</enrichment>
    <author>
      <firstName>Lukas</firstName>
      <lastName>Haußmann</lastName>
    </author>
    <submitter>
      <firstName>Florian</firstName>
      <lastName>Pyczak</lastName>
    </submitter>
    <author>
      <firstName>Steffen</firstName>
      <lastName>Neumeier</lastName>
    </author>
    <author>
      <firstName>Johannes</firstName>
      <lastName>Bresler</lastName>
    </author>
    <author>
      <firstName>Simon</firstName>
      <lastName>Keim</lastName>
    </author>
    <author>
      <firstName>Florian</firstName>
      <lastName>Pyczak</lastName>
    </author>
    <author>
      <firstName>Mathias</firstName>
      <lastName>Göken</lastName>
    </author>
    <collection role="institutes" number="3421">FG Mikrostrukturelles Werkstoffdesign</collection>
  </doc>
</export-example>
