TY - GEN
T1 - δ-phase characterization of superalloy Allvac 718 Plus™
AU - Sommitsch, Christof
AU - Stotter, Christoph
AU - Leitner, Harald
AU - Mitsche, Stefan
AU - Letofsky-Papst, Ilse
AU - Stockinger, Martin
PY - 2008/9/26
Y1 - 2008/9/26
N2 - Nowadays, the trend goes to better and more efficient gas turbine engines with low emission, great durability and low cycle cost. Therefore, a new grade, Allvac 718 Plus™, shall enhance the high temperature properties. The appearance, morphology and control of δ-phase are of special interest because of their critical influence on grain structure, grain size and mechanical properties. In this work, the evolution of the δ-phase during a heat treatment between 900 and 1000°C for annealing times of up to 8 hours is investigated in order to determine the time temperature precipitation (TTP) diagram and to understand the phase morphology. For this, different analysis methods are applied, such as light microscopy analysis with computer-aided quantitative metallography, differential scanning calorimetry (DSC) and both scanning electron (SEM) and transmission electron microscopy (TEM).
AB - Nowadays, the trend goes to better and more efficient gas turbine engines with low emission, great durability and low cycle cost. Therefore, a new grade, Allvac 718 Plus™, shall enhance the high temperature properties. The appearance, morphology and control of δ-phase are of special interest because of their critical influence on grain structure, grain size and mechanical properties. In this work, the evolution of the δ-phase during a heat treatment between 900 and 1000°C for annealing times of up to 8 hours is investigated in order to determine the time temperature precipitation (TTP) diagram and to understand the phase morphology. For this, different analysis methods are applied, such as light microscopy analysis with computer-aided quantitative metallography, differential scanning calorimetry (DSC) and both scanning electron (SEM) and transmission electron microscopy (TEM).
KW - Allvac 718Plus™
KW - Delta-phase
KW - Nickel-base superalloy
UR - http://www.scopus.com/inward/record.url?scp=52249117670&partnerID=8YFLogxK
M3 - Conference paper
AN - SCOPUS:52249117670
SN - 9780873397179
T3 - TMS Annual Meeting
SP - 63
EP - 68
BT - TMS2008 - 137th Annual Meeting and Exhibition Supplemental Proceedings
T2 - TMS 2008 Annual Meeting Supplemental: Materials Processing and Properties
Y2 - 9 March 2008 through 13 March 2008
ER -