TY - JOUR

T1 - Thermal Expansion of a Multiphase Intermetallic Ti-Al-Nb-Mo Alloy Studied by High-Energy X-ray Diffraction

AU - Staron, Peter

AU - Stark, Andreas

AU - Schell, Norbert

AU - Spörk-Erdely, Petra

AU - Clemens, Helmut

PY - 2021/2/4

Y1 - 2021/2/4

N2 - Intermetallic γ-TiAl-based alloys are lightweight materials for high-temperature applica-tions, e.g., in the aerospace and automotive industries. They can replace much heavier Ni-based alloys at operating temperatures up to 750 ◦C. Advanced variants of this alloy class enable processing routes that include hot forming. These alloys consist of three relevant crystallographic phases (γ-TiAl, α 2-Ti 3Al, β o-TiAl) that transform into each other at different temperatures. For thermo-mechanical treatments as well as for adjusting alloy properties required under service conditions, the knowledge of the thermal expansion behavior of these phases is important. Therefore, thermal expansion co-efficients were determined for the relevant phases in a Ti-Al-Nb-Mo alloy for temperatures up to 1100 ◦C using high-energy X-ray diffraction.

AB - Intermetallic γ-TiAl-based alloys are lightweight materials for high-temperature applica-tions, e.g., in the aerospace and automotive industries. They can replace much heavier Ni-based alloys at operating temperatures up to 750 ◦C. Advanced variants of this alloy class enable processing routes that include hot forming. These alloys consist of three relevant crystallographic phases (γ-TiAl, α 2-Ti 3Al, β o-TiAl) that transform into each other at different temperatures. For thermo-mechanical treatments as well as for adjusting alloy properties required under service conditions, the knowledge of the thermal expansion behavior of these phases is important. Therefore, thermal expansion co-efficients were determined for the relevant phases in a Ti-Al-Nb-Mo alloy for temperatures up to 1100 ◦C using high-energy X-ray diffraction.

UR - http://www.scopus.com/inward/record.url?scp=85100751519&partnerID=8YFLogxK

U2 - 10.3390/ma14040727

DO - 10.3390/ma14040727

M3 - Article

VL - 14.2021

SP - 1

EP - 13

JO - Materials

JF - Materials

SN - 1996-1944

IS - 4

M1 - 727

ER -