scholarly journals 2019 ACCOMPLISHMENTS - DEGRADATION OF MECHANICAL PROPERTIES IN STRUCTURAL METALS AND WELDS FOR GTS RESERVOIRS

2020 ◽  
Author(s):  
T. Krentz ◽  
D. Hitchcock
Keyword(s):  
Mechanical Properties ◽  
Degradation Of Mechanical Properties ◽  
Structural Metals

scholarly journals SNL/SRNL Joint Project on degradation of mechanical properties in structural metals and welds for GTS reservoirs.

2015 ◽  
Author(s):  
Joseph Allen Ronevich ◽  
Dorian K. Balch ◽  
Christopher W. San Marchi ◽  
Scott West ◽  
Mike Morgan
Keyword(s):  
Mechanical Properties ◽  
Joint Project ◽  
Degradation Of Mechanical Properties ◽  
Structural Metals

Hydrogen-Related Degradation of Mechanical Properties of Titanium and Titanium Alloys

2009 ◽  
Vol 6 (1) ◽  
pp. 101853
Author(s):  
Kenzo Asaoka ◽  
Kunimitsu Maejima ◽  
Kenneth L. Jerina ◽  
Michael R. Mitchell ◽  
Terry O. Woods ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloys ◽  
Degradation Of Mechanical Properties

scholarly journals The degradation of mechanical properties in halloysite nanoclay–polyester nanocomposites exposed to diluted methanol

2016 ◽  
Vol 51 (11) ◽  
pp. 1653-1664 ◽  
Author(s):  
Mohd Shahneel Saharudin ◽  
Rasheed Atif ◽  
Islam Shyha ◽  
Fawad Inam
Keyword(s):  
Mechanical Properties ◽  
Impact Toughness ◽  
Degradation Of Mechanical Properties ◽  
Before And After ◽  
The Matrix ◽  
Methanol Exposure ◽  
The Impact ◽  
And Storage ◽  
Methanol System ◽  
Methanol Absorption

The degradation of mechanical properties in halloysite nanoclay–polyester nanocomposites was studied after an exposure of 24 h in diluted methanol system by clamping test specimens across steel templates. The glass transition temperature ( Tg) and storage modulus increased steadily with the increase of halloysite nanoclays before and after diluted methanol exposure. The addition of nano-fillers was found to reduce liquid uptake by 0.6% in case of 1 wt% reinforcement compared to monolithic polyester. The mechanical properties of polyester-based nanocomposites were found to decrease as a result of diluted methanol absorption. After diluted methanol exposure, the maximum microhardness, tensile, flexural and impact toughness values were observed at 1 wt% of halloysite nanoclay. The microhardness increased from 203 to 294 HV (45% increase). The Young’s modulus increased from 0.49 to 0.83 GPa (70% increase) and the tensile strength increased from 23 to 27 MPa (17.4% increase). The impact toughness increased from 0.19 to 0.54 kJ/m2 in diluted methanol system (184% increase). Surprisingly, the fracture toughness of all types of nanocomposites was found to increase after exposing to diluted methanol due to plasticization effect. Scanning electron microscope images of the fractured surfaces of tensile specimens revealed that the methanol increased the ductility of the matrix and reduced the mechanical properties of the nanocomposites.

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