scholarly journals Refinement of second phase dispersions in iron aluminide intermetallics by high-temperature severe plastic deformation

2012 ◽  
Vol 23 ◽  
pp. 169-176 ◽  
Author(s):  
D.G. Morris ◽  
M.A. Muñoz-Morris
Keyword(s):  
Plastic Deformation ◽  
High Temperature ◽  
Severe Plastic Deformation ◽  
Iron Aluminide ◽  
Second Phase

Processing iron aluminides by heavy deformation for improved room temperature strength-ductility and for high temperature creep strength

2011 ◽  
Vol 1295 ◽  
Author(s):  
David G. Morris ◽  
Maria Antonia Muñoz-Morris
Keyword(s):  
Plastic Deformation ◽  
Grain Size ◽  
High Temperature ◽  
Severe Plastic Deformation ◽  
Creep Strength ◽  
Room Temperature ◽  
High Strain ◽  
Iron Aluminides ◽  
Al Alloy ◽  
Second Phase

ABSTRACTIron aluminides show many interesting properties, but still show relatively poor ductility at room temperature and only moderate creep resistance at temperatures above about 600ºC. Processes of severe plastic deformation have been investigated for a wide range of ductile alloys over the past decade, but have hardly been considered for intermetallics. This presentation discusses two studies aimed at refining microstructure by the use of severe plastic deformation of iron aluminides. The first considers processing Fe3Al by heavy cold rolling, followed by annealing for recovery or recrystallization, with an objective of refining grain size to improve strength at the same time as ductility. The high strength and poor ductility of the work hardened material leads to a danger of cracking during rolling, which is a problem for manufacturing large quantities of healthy material. Suitable rolling and recovery treatments can, nevertheless, lead to strong materials with some plastic ductility. A different technique of multidirectional, high-strain and high-temperature forging applied to a boride-containing Fe3Al alloy produces a material with large grain size and refined dispersion of boride particles. These particles lead to a considerable increase in creep strength under conditions of moderate stresses at temperatures around 700ºC. This high-strain forging technique can be seen as an intermediate processing method between conventional wrought metallurgy and mechanical-alloying powder metallurgy. This technique offers the possibility to improve high temperature behaviour of such intermetallics containing second-phase dispersions, and can be scaled to produce large quantities of high-quality material.

scholarly journals Deformation of Second Phase Particles in Al Alloy Using Severe Plastic Deformation Process

Materia Japan ◽  
2003 ◽  
Vol 42 (12) ◽  
pp. 863-863 ◽  
Author(s):  
Keiichiro Ohishi ◽  
Takeshi Fujita ◽  
Kunihiro Ohashi ◽  
Kenji Kaneko ◽  
Zenji Horita
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Deformation Process ◽  
Al Alloy ◽  
Second Phase ◽  
Severe Plastic Deformation Process ◽  
Plastic Deformation Process ◽  
Second Phase Particles

Role of severe plastic deformation on the cyclic reversibility of a Ti50.3Ni33.7Pd16 high temperature shape memory alloy

2010 ◽  
Vol 58 (19) ◽  
pp. 6411-6420 ◽  
Author(s):  
B. Kockar ◽  
K.C. Atli ◽  
J. Ma ◽  
M. Haouaoui ◽  
I. Karaman ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
High Temperature ◽  
Shape Memory Alloy ◽  
Severe Plastic Deformation ◽  
Shape Memory

Development of Unconventional Processing of Steels in Semi-Solid State

2016 ◽  
Vol 256 ◽  
pp. 251-256
Author(s):  
Bohuslav Mašek ◽  
David Aišman ◽  
Filip Vančura ◽  
Martin F.X. Wagner ◽  
Hana Jirková ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
High Temperature ◽  
Solid State ◽  
Severe Plastic Deformation ◽  
Rapid Solidification ◽  
Process Conditions ◽  
In Situ Observation ◽  
Semi Solid

This paper describes selected capabilities of unconventional processing of steels in semi-solid state under various process conditions and with the use of various steel chemistries for obtaining unusual structures formed by rapid solidification in combination with other procedures. This investigation involves the use of severe plastic deformation techniques (SPD) and in-situ observation of the transformation of microstructure from solid state to semi-solid state at temperatures above 1200°C using a high-temperature microscope.

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