Publication detail
EFFECT OF HEAT TREATMENTS WITH A POINTED COOLING ON THE MECHANICAL COMPRESSION PROPERTIES OF TiAl INTERMETALIC
PETRENEC, M. KRUML, T. ZEMANOVÁ, A. KRAHULA, K
Czech title
Vliv tepelného zpracování intemetalika TiAl na pevnost v tlaku
English title
EFFECT OF HEAT TREATMENTS WITH A POINTED COOLING ON THE MECHANICAL COMPRESSION PROPERTIES OF TiAl INTERMETALIC
Type
conference paper
Language
en
Original abstract
The influence of the graded cooling heat treatments on a change in the structure and the room temperature mechanical compression properties of cast Ti-44Al-8Nb intermetallic were studied. The used heat treatments were consisting from heating to the temperature 1350 C and following variable cooling. The coolings were the air cooling and the graded cooling which was composed of combination of furnace cooling and air cooling for selected two temperatures 1315C and 1200 C. These selected temperatures were used from the measuring of the differential thermal analysis (DTA) which was used to determine the phase transformation temperatures. All heat treatments used remold the cast nearly lamellar structure gamma, alfa 2 to the fully lamellar uniform structure and decreased the average grain size to the half. The air cooling and the graded cooling with temperature 1315C were produced in higher yield stress and lower plasticity due the very thin lamellar thickness and planar grain boundary. While higher plasticity and lower yield stress are obtained using the graded cooling with temperature 1200 C. It is caused by the very thick lamellar spacing and locked grain boundaries.
Czech abstract
Vliv odstupńovaného chlazení na změny struktury a mechanické vlastnosti slitiny TiAl. Tepelné zpracování se skládá z ohřevu na teplotu 1350C a následného potupného zchlazení na dvě teploty a to 1315 a 1200C.
English abstract
The influence of the graded cooling heat treatments on a change in the structure and the room temperature mechanical compression properties of cast Ti-44Al-8Nb intermetallic were studied. The used heat treatments were consisting from heating to the temperature 1350 C and following variable cooling. The coolings were the air cooling and the graded cooling which was composed of combination of furnace cooling and air cooling for selected two temperatures 1315C and 1200 C. These selected temperatures were used from the measuring of the differential thermal analysis (DTA) which was used to determine the phase transformation temperatures. All heat treatments used remold the cast nearly lamellar structure gamma, alfa 2 to the fully lamellar uniform structure and decreased the average grain size to the half. The air cooling and the graded cooling with temperature 1315C were produced in higher yield stress and lower plasticity due the very thin lamellar thickness and planar grain boundary. While higher plasticity and lower yield stress are obtained using the graded cooling with temperature 1200 C. It is caused by the very thick lamellar spacing and locked grain boundaries.
Keywords in Czech
tepelné zpracování, plně lamelární jednotná struktura, mez kluzu
Keywords in English
heat treatments,fully lamellar uniform structure,yield stress
RIV year
2010
Released
17.05.2010
Publisher
TANGER Ltd.
Location
Rožnov pod Radhoštěm
ISBN
978-80-87294-39-0
Book
Metal 2010
Pages from–to
1–8
Pages count
8
BIBTEX
@inproceedings{BUT108945,
author="Martin {Petrenec} and Tomáš {Kruml} and Adéla {Zemanová} and Karel {Krahula},
title="EFFECT OF HEAT TREATMENTS WITH A POINTED COOLING ON THE MECHANICAL COMPRESSION PROPERTIES OF TiAl INTERMETALIC",
booktitle="Metal 2010",
year="2010",
month="May",
pages="1--8",
publisher="TANGER Ltd.",
address="Rožnov pod Radhoštěm",
isbn="978-80-87294-39-0"
}