An investigation to the effect of deformation-heat treatment cycle on the eutectic morphology and mechanical properties of a Thixocast A356 alloy

2009 ◽  
Vol 60 (8) ◽  
pp. 817-823 ◽  
Author(s):  
M. Haghshenas ◽  
A. Zarei-Hanzaki ◽  
M. Jahazi
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Treatment Cycle ◽  
A356 Alloy ◽  
Heat Treatment Cycle ◽  
Eutectic Morphology ◽  
Morphology And Mechanical Properties

Optimization of Heat Treatment Cycles for Automotive Parts Produced by Rheocasting Process

2006 ◽  
Vol 116-117 ◽  
pp. 505-508 ◽  
Author(s):  
Mario Rosso ◽  
Marco Actis Grande
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Performance ◽  
Treatment Cycle ◽  
Total Cost ◽  
Heat Treatment Cycle ◽  
Dimensional Precision ◽  
Heat Treated ◽  
Automotive Parts ◽  
High Level

This work aims at studying the possibility of optimising the heat treatment cycles of parts produced using the New Rheocasting process in order to reduce the total cost of the operation, attaining good mechanical properties for high performance parts. The mechanical properties and the microstructure features of the considered A 356 alloy and the relative produced parts have been analysed and studied on samples machined both from the as cast and from the heat treated compomnents. The obtained results showed the possibility of successfully modifying the T6 heat treatment cycle with economical benefits, maintaining at the same time comparable high level properties and performances, together with good dimensional precision.

Effect of Heat Treatment on the Mechanical Properties of Copper-Beryllium Alloy (C17200)

2015 ◽  
Vol 830-831 ◽  
pp. 168-171 ◽  
Author(s):  
S. Alisha ◽  
T. Venkateswaran ◽  
M. Amruth ◽  
P. Chakravarthy ◽  
D. Sivakumar
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Treatment Cycle ◽  
Coefficient Of Thermal Expansion ◽  
Aging Treatment ◽  
Optical Microscope ◽  
Tem Analysis ◽  
Heat Treatment Cycle ◽  
Conventional Heat Treatment ◽  
Copper Beryllium

Owing to high elastic modulus and good strength, copper beryllium alloys are widely used in many engineering applications. The addition of beryllium to copper makes the alloy respond to aging treatment and thus develops very high strength. Conventional heat treatment cycles are available for copper-beryllium to obtain peak ageing hardness condition. Present study has focused on developing a heat treatment cycle to obtain synergetic combination of moderate strength and good toughness for the C17200 copper-beryllium alloy. Ageing curves have been generated for varying temperature and time. Detailed mechanical properties (hardness, impact, tensile) evaluation at room temperature and sub-zero temperatures have been carried out for the selected samples. Modified heat treatment cycle resulted in higher toughness with adequate strength. Optical microscope (OM) and transmission electron microscope (TEM) analysis were carried out to understand the precipitation behavior. Also, measurements of coefficient of thermal expansion (CTE) and thermal conductivity were carried out on the aged samples.

Synthesis of Si3N4 Powder by Thermal Decomposition of SI(NH)2

1992 ◽  
Vol 287 ◽  
Author(s):  
Silvia Ampuero ◽  
Paul Bowen ◽  
Terry A. Ring
Keyword(s):  
Heat Treatment ◽  
Thermal Decomposition ◽  
Thermal Treatment ◽  
Treatment Cycle ◽  
Heat Treatment Cycle ◽  
Si3n4 Powder

ABSTRACTA fine white α-Si3N4 powder has been produced by the thermal decomposition of the coprecipitation product of the reaction between SiC14 and NH3. The Cl content, due to a reaction between Si(NH)2 and the NH4Cl by-product during the thermal treatment of the coprecipitate, has been reduced by using an isothermal step at ≈ 250°C in the heat treatment cycle.

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