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Heat treatment and mechanical properties of TiAl alloy with high Nb content

SYSNO ASEP	0331771
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Ostatní články
Title	Heat treatment and mechanical properties of TiAl alloy with high Nb content
Author(s)	Petrenec, Martin (UFM-A) Zemanová, Adéla (UFM-A)_{RID, ORCID} Krahula, Karel (UFM-A) Kruml, Tomáš (UFM-A)_{RID, ORCID} Man, Jiří (UFM-A)_{RID, ORCID}
Number of authors	5
Source Title	Materiálové inžinierstvo - Materials Engineering - ISSN 1335-0803 Roč. 16, 3a (2009), s. 13-18
Number of pages	6 s.
Action	Degradácia konštrukčných materiálov 2009
Event date	02.09.2009-04.09.2009
VEvent location	Tatranská Lomnica
Country	SK - Slovakia
Event type	WRD
Language	eng - English
Country	SK - Slovakia
Keywords	TiAl-8Nb intermetallic ; step cooling heat treatments ; compression test
Subject RIV	JJ - Other Materials
R&D Projects	1QS200410502 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	GA106/08/1631 GA ČR - Czech Science Foundation (CSF)
	OC08053 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z20410507 - UFM-A (2005-2011)
Annotation	The influence of the fully lamellar strucute produced by heat treatment on mechanical properties of near gama-Ti-44Al-8Nb intermetallic was investigated. Effect of improved microstructural control on compression resistance is demonstrated using the step cooling from. The differential thermal analysis was used to determine the phase transformation temperatures as the alfa transu. The heat treatment used, consisting in different cooling from alfa region, remould the as-cast nearly lamellar structure to the fully lamellar uniform structure and decreased the average grain size to the half.The furnace cooling to 1315°C and the following air cooling result 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 furnace cooling from to 1200°C and the following air cooling. It is caused by the very thick lamellar spacing and locked grain boundaries.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2010

Number of the records: 1