Retraction notice to “Applying a novel heat treatment cycle to modify the microstructure of welded API X70 pipeline steel” [MLBLUE 98C (2013) 178–81]

2013 ◽  
Vol 98 ◽  
pp. R1
Author(s):  
Mostafa Alizadeh ◽  
SajjadBordbar
Keyword(s):  
Heat Treatment ◽  
Treatment Cycle ◽  
Pipeline Steel ◽  
X70 Pipeline Steel ◽  
Heat Treatment Cycle ◽  
Retraction Notice

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.

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.

Characterization of Crystallographic Texture of ERW Welded and Heat-Treated API X70 Pipeline Steel

2020 ◽  
Author(s):  
Nitin Sharma ◽  
Yiyu Wang ◽  
Leijun Li ◽  
Neil Anderson ◽  
Muhammad Rashid
Keyword(s):  
Heat Treatment ◽  
Impact Toughness ◽  
Crystallographic Texture ◽  
High Frequency ◽  
Pipeline Steel ◽  
Bond Line ◽  
Electric Resistance ◽  
Line Pipe ◽  
X70 Pipeline Steel ◽  
The Impact

Abstract The impact toughness of high frequency electric resistance welded (ERW) line pipe depends on the steel chemical composition, welding procedure, and post-welding heat treatment. Among several microstructural factors that may influence the impact toughness of high frequency electric resistance welded bond line, the crystallographic texture factor is often assumed, but not sufficiently studied. The evolution of texture during high frequency electric resistance welding and simulated post-welding heat treatments (PWHT) of API X70 pipeline steel was characterized using X-ray diffraction (XRD) and electron backscatter diffraction (EBSD). Results of a texture factor calculated using the θ/2θ XRD scans indicated that following the post-weld normalizing treatment, the texture factor of {100} planes for the weld bond line appeared to have increased with the increase in post-weld normalizing temperature. The texture factor results obtained from θ/2θ XRD scans were further verified by using the EBSD on the CVN tested samples in the regions near the fracture path. The XRD texture factor was also used to correlate the evolution of crystallographic texture and Charpy toughness for the PWHT samples. Based on the observations from both XRD and EBSD, the {100} crystallographic orientation of planes in the notched direction correlates well with the cleavage fracture planes of the Charpy impact tested samples. Therefore, the post-weld heat treatment should be designed to minimize any preferred crystallographic texture with {100} planes in the bond line, to promote ductile fracture and improved bond line impact toughness at low temperatures.

The effect of different heat treatment cycle on hot corrosion and oxidation behavior of Ti–6Al–4V

2019 ◽  
Vol 6 (11) ◽  
pp. 116599 ◽  
Author(s):  
F Sharifi ◽  
V Abouei ◽  
A Alizadeh ◽  
Y Shajari ◽  
M Porhonar ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Hot Corrosion ◽  
Oxidation Behavior ◽  
Treatment Cycle ◽  
Heat Treatment Cycle ◽  
Corrosion And Oxidation
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