High temperature anti-oxidation behavior of in situ and ex situ nanostructured C/SiC/ZrB2 -SiC gradient coatings: Thermodynamical evolution, microstructural characterization, and residual stress analysis

2018 ◽  
Vol 15 (6) ◽  
pp. 1319-1333 ◽  
Author(s):  
Alireza Abdollahi ◽  
Zia Valefi ◽  
Naser Ehsani ◽  
Shahla Torabi
Keyword(s):  
Residual Stress ◽  
High Temperature ◽  
Stress Analysis ◽  
Oxidation Behavior ◽  
Microstructural Characterization ◽  
Ex Situ ◽  
Residual Stress Analysis ◽  
Gradient Coatings

scholarly journals In-situ Residual Stress Analysis during Thermal Cycle of a Dissimilar Weld Joint Using Neutron Diffraction and IEFEM

2017 ◽  
Vol 35 (2) ◽  
pp. 112s-116s ◽  
Author(s):  
Koichi Akita ◽  
Masakazu Shibahara ◽  
Kazuki Ikushima ◽  
Satoru Nishikawa ◽  
Takashi Furukawa ◽  
...  
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
Stress Analysis ◽  
Weld Joint ◽  
Thermal Cycle ◽  
Dissimilar Weld ◽  
Residual Stress Analysis

Residual Stress Analysis of A362 Aluminum Alloy Gear Case Using Neutron Diffraction

2018 ◽  
Vol 941 ◽  
pp. 1288-1294 ◽  
Author(s):  
Dimitry Sediako ◽  
Joshua Stroh ◽  
Alexandra McDougall ◽  
Ermia Aghaie
Keyword(s):  
Heat Treatment ◽  
Residual Stress ◽  
Neutron Diffraction ◽  
Stress Analysis ◽  
Volume Fraction ◽  
High Stress ◽  
Microstructural Characterization ◽  
Heat Treated ◽  
Material State ◽  
Residual Stress Analysis

Mercury Marine has used a new alloy, Mercalloy A362, for the manufacturing of a re-designed lower unit transmission gearcase. The enhanced strength of the alloy allowed for a substantial weight reduction in the new design. The purpose of this study was to examine and determine why cracking may develop in the gear casing during in service testing. Two types of material states, (i) as cast and (ii) heat treated were compared. Metallography and neutron diffraction analysis was carried out at locations identified as being areas of high stress by Magma software – which was performed in a separate study. Microstructural characterization at these locations revealed microstructural and the compositional differences. Differences in the porosity, eutectic phase, and volume fraction of the precipitates were observed at various locations of interest in each material state. The residual stress analysis was performed with application of neutron diffraction and revealed that the stresses in the as-cast component reached a maximum value of 120 MPa, which is below the yield strength of the alloy. The heat treatment applied to the castings reduced the stress by approximately 50 MPa. Based on the microstructure and neutron diffraction results, it is likely that performing a heat treatment process extends the lifetime of the component, however, it may not completely eliminate the cracking problem. Farther studies are currently nearing completion, targeting the mass production of the redesigned gearcase.

Welding of ASTM A106 Gr. B steel pipes for high-temperature service – part 1 – residual stress analysis

2009 ◽  
Vol 23 (4) ◽  
pp. 270-281 ◽  
Author(s):  
Cleiton Carvalho Silva ◽  
Arlindo Braga de Souza Neto ◽  
Francisco Diego Araruna da Silva ◽  
Francisco Edval Sampaio de Freitas Júnior ◽  
Jesualdo Pereira Farias
Keyword(s):  
Residual Stress ◽  
High Temperature ◽  
Stress Analysis ◽  
Steel Pipes ◽  
Residual Stress Analysis

In situ residual stress analysis in a phenolic resin and copper composite material during curing

Polymer ◽  
2019 ◽  
Vol 182 ◽  
pp. 121857 ◽  
Author(s):  
Atsushi Izumi ◽  
Takeshi Kakara ◽  
Midori Wakabayashi Otsuki ◽  
Yasuyuki Shudo ◽  
Tomoyuki Koganezawa ◽  
...  
Keyword(s):  
Residual Stress ◽  
Composite Material ◽  
Stress Analysis ◽  
Phenolic Resin ◽  
Residual Stress Analysis ◽  
Copper Composite
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