ORBi: Vaneetveld Grégory - Benefits of thixoforging hot-crack-sensitive aluminium alloys at high solid fraction

Reference : Benefits of thixoforging hot-crack-sensitive aluminium alloys at high solid fraction


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Materials science & engineering
	To cite this reference:	http://hdl.handle.net/2268/11408

Title :	Benefits of thixoforging hot-crack-sensitive aluminium alloys at high solid fraction
Language :	English
Alternative title :	[fr] Avantages du thixoforgeage à haute fraction solide des alliages d'aluminiums sensibles à la fisuration à chaud
Author, co-author :	Vaneetveld, Grégory [Université de Liège - ULg > Département d'aérospatiale et mécanique > Science des matériaux métalliques >]
	Rassili, Ahmed [Université de Liège - ULg > Département d'aérospatiale et mécanique > Science des matériaux métalliques >]
	Pierret, Jean-Christophe [Université de Liège - ULg > Département d'aérospatiale et mécanique > Science des matériaux métalliques >]
	Lecomte-Beckers, Jacqueline [Université de Liège - ULg > Département d'aérospatiale et mécanique > Science des matériaux métalliques >]
Publication date :	2009
Main document title :	Proceedings of The 13th Esaform Conference on Material Forming (2010) - semi-solid processing
Publisher :	SpringerLink
Pages :	777-780
On invitation :	No
Audience :	International
City :	Brescia
Country :	Italie
Event name :	Esaform 2010
Event date :	du 7 avril 2009 au 9 avril 2009
Event place (city) :	Brescia
Event country :	Italie
Keywords :	[en] Hot cracking ; wrought aluminium alloys ; thixoforging
Abstract :	[en] Thixoforging is a type of semi-solid metal processing at high solid fraction (0.7<fs<1), which involves the processing of alloys in the semi-solid state. The use of semi-solid material with globular microstructure helps to decrease forming load. But the introduction of a liquid phase in the material is a source of defects that limit mechanical properties of thixoforged parts. One of these defects is the hot cracking for some hot crack-sensitive wrought aluminium alloys. Hot cracking occurs because of strain and deformation during last step of solidification. This paper shows how thixoforging process helps to lower hot cracking tendency without modification of the alloy composition by decreasing strain and deformation due to shrinkage. Different experimental tests by extrusion of 7075 aluminium alloys are used.
Name of the research project :	THIXALU
Target :	Researchers ; Professionals ; Students ; General public ; Others
Permalink :	http://hdl.handle.net/2268/11408
DOI :	10.1007/s12289-009-0623-5
Other URL :	http://www.springerlink.com/content/120979/?p=cbf46bbb41c34c02b0e53931d3f06b17&pi=0

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