Mahdieh Safyari
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View article: Tailoring precipitates for enhanced hydrogen trapping in aluminum alloys
Tailoring precipitates for enhanced hydrogen trapping in aluminum alloys Open
Enhancing the hydrogen embrittlement (HE) resistance of alloys caters to the urgent needs of engineering safety and long-distance hydrogen transportation. Highly dense precipitates in the alloys act as H traps, however, some of them cannot…
View article: Influence of welding-induced microstructure on fatigue crack growth in 5xxx aluminum alloys in air and hydrogen environments
Influence of welding-induced microstructure on fatigue crack growth in 5xxx aluminum alloys in air and hydrogen environments Open
View article: Enhancing hydrogen embrittlement resistance in steel pipelines through hybrid welding
Enhancing hydrogen embrittlement resistance in steel pipelines through hybrid welding Open
This study investigates the microstructure and hydrogen embrittlement behavior of weld metals produced by hybrid laser-arc welding (HLAW) and metal active gas (MAG). Cross-sectional SEM analysis revealed that the HLAW process resulted in a…
View article: Welding design of API 5L X65 pipeline steel: Effects of robotic hybrid laser arc welding versus GMAW on fracture toughness evaluated by SENT tests in air and hydrogen
Welding design of API 5L X65 pipeline steel: Effects of robotic hybrid laser arc welding versus GMAW on fracture toughness evaluated by SENT tests in air and hydrogen Open
This study examines the microstructural and mechanical properties of ferritic steel specimens welded using the gas metal arc welding (GMAW) and hybrid laser arc welding (HLAW) processes, focusing on their behaviour in both air and hydrogen…
View article: Effect of hydrogen on dynamic precipitation in additively manufactured aluminum alloys: Evidence for HEENT mechanism
Effect of hydrogen on dynamic precipitation in additively manufactured aluminum alloys: Evidence for HEENT mechanism Open
View article: Exceptional stress corrosion cracking resistance of additively manufactured aluminum alloys in simulated marine environments
Exceptional stress corrosion cracking resistance of additively manufactured aluminum alloys in simulated marine environments Open
In this study, an Al–Mg alloy was manufactured using the laser powder bed fusion (L-PBF) additive manufacturing method. A combination of numerical calculations and atomic/microstructural observations revealed that the complex interactions …
View article: Multiscale fatigue assessment of wire arc additively manufactured aluminium alloys with experimental and simulation approach
Multiscale fatigue assessment of wire arc additively manufactured aluminium alloys with experimental and simulation approach Open
This study investigates the fatigue behaviour of wire arc additively manufactured (WAAM) aluminium alloys, emphasizing the role of pore in fatigue life assessment. Using a multiscale experimental and simulation approach, it was found that …
View article: Hydrogen-assisted fatigue crack growth in pipeline steels: a machine learning approach
Hydrogen-assisted fatigue crack growth in pipeline steels: a machine learning approach Open
View article: Capacity of hydrogen traps affects H-assisted crack initiation and propagation mechanisms in martensitic steels
Capacity of hydrogen traps affects H-assisted crack initiation and propagation mechanisms in martensitic steels Open
Low-carbon martensitic steels are candidate materials for different hydrogen applications. Hydrogen embrittlement (HE) of the steels can be mitigated by designing trap site characteristics. In this study, the different capacities of hydrog…
View article: A new methodology for extra enhancement of hydrogen storage capacity of Mg–Ni based alloys: The role of gaseous O2/H2 mixture
A new methodology for extra enhancement of hydrogen storage capacity of Mg–Ni based alloys: The role of gaseous O2/H2 mixture Open
In the present study, Mg–5Ni and Mg–15Ni alloys are prepared, and their (de)hydrogenation properties are investigated by thermal desorption spectroscopy (TDS). A new hydrogenation condition is developed to improve the hydrogen uptake prope…
View article: Design of hydrogen embrittlement resistant 7xxx-T6 aluminum alloys based on wire arc additive manufacturing: Changing nanochemistry of strengthening precipitates
Design of hydrogen embrittlement resistant 7xxx-T6 aluminum alloys based on wire arc additive manufacturing: Changing nanochemistry of strengthening precipitates Open
View article: Manipulating nanostructure during wire arc additive manufacturing defeats hydrogen embrittlement
Manipulating nanostructure during wire arc additive manufacturing defeats hydrogen embrittlement Open
View article: Superior hydrogen production rate by corrosion of recycled aluminum alloys: Feeding a PEM fuel cell
Superior hydrogen production rate by corrosion of recycled aluminum alloys: Feeding a PEM fuel cell Open
Aluminum is one of the most versatile materials for the dynamic global economy due to its mechanical properties, recyclability, and lightweight. The production of hydrogen from aluminum via hydrolysis in alkaline media offers another advan…
View article: Hydrogen-Driven Modification of Dynamic Precipitate Morphology Enhances Mechanical Properties in Al-Si Alloy Additively Manufactured by Laser Powder Bed Fusion
Hydrogen-Driven Modification of Dynamic Precipitate Morphology Enhances Mechanical Properties in Al-Si Alloy Additively Manufactured by Laser Powder Bed Fusion Open
View article: Hydrogen-enhanced entropy (HEENT): A concept for hydrogen embrittlement prediction
Hydrogen-enhanced entropy (HEENT): A concept for hydrogen embrittlement prediction Open
View article: Hydrogen trapping and permeability in carbon fiber reinforced aluminum alloys
Hydrogen trapping and permeability in carbon fiber reinforced aluminum alloys Open
Carbon fibers and aluminum-based alloys are the most common choice for today's advanced hydrogen storage solutions due to their lightweight. They also combine exceptional mechanical performance and resistance to most chemicals. However, ca…
View article: Design of high-strength martensitic steels by novel mixed-metal nanoprecipitates for high toughness and suppressed hydrogen embrittlement
Design of high-strength martensitic steels by novel mixed-metal nanoprecipitates for high toughness and suppressed hydrogen embrittlement Open
View article: Inhibition of grain growth by pearlite improves hydrogen embrittlement susceptibility of the ultra-low carbon ferritic steel: the influence of H-assisted crack initiation and propagation mechanisms
Inhibition of grain growth by pearlite improves hydrogen embrittlement susceptibility of the ultra-low carbon ferritic steel: the influence of H-assisted crack initiation and propagation mechanisms Open
The influence of grain growth inhibition by pearlite on hydrogen embrittlement (HE) behavior of ultra-low carbon ferritic steels was studied. The Fe-0.02C alloy has a considerable sensitivity to HE, while the Fe and Fe-0.1C materials have …
View article: New insights into hydrogen trapping and embrittlement in high strength aluminum alloys
New insights into hydrogen trapping and embrittlement in high strength aluminum alloys Open
View article: The effect of HPAM polymer for enhanced oil recovery on corrosion behaviour of a carbon steel and interaction with the inhibitor under simulated brine conditions
The effect of HPAM polymer for enhanced oil recovery on corrosion behaviour of a carbon steel and interaction with the inhibitor under simulated brine conditions Open
View article: Mechanisms of hydrogen absorption, trapping and release during galvanostatic anodization of high-strength aluminum alloys
Mechanisms of hydrogen absorption, trapping and release during galvanostatic anodization of high-strength aluminum alloys Open
The initial growth of a porous alumina layer and the hydrogen absorption during galvanostatic anodization were studied using high-resolution electron microscopy, thermal desorption spectroscopy, and hydrogen microprint technique. The nanos…
View article: Combined thermal desorption spectroscopy, hydrogen visualization, HRTEM and EBSD investigation of a Ni–Fe–Cr alloy: The role of hydrogen trapping behavior in hydrogen-assisted fracture
Combined thermal desorption spectroscopy, hydrogen visualization, HRTEM and EBSD investigation of a Ni–Fe–Cr alloy: The role of hydrogen trapping behavior in hydrogen-assisted fracture Open
The role of hydrogen trapping behavior in hydrogen-assisted cracking in a Ni–Fe–Cr alloy has been investigated using thermal desorption spectroscopy (TDS), hydrogen visualization, and high-resolution microstructural characterization method…
View article: Hydrogen absorption rate and hydrogen diffusion in a ferritic steel coated with a micro- or nanostructured ZnNi coating
Hydrogen absorption rate and hydrogen diffusion in a ferritic steel coated with a micro- or nanostructured ZnNi coating Open
View article: Role of Ultrasonic Shot Peening in Environmental Hydrogen Embrittlement Behavior of 7075-T6 Alloy
Role of Ultrasonic Shot Peening in Environmental Hydrogen Embrittlement Behavior of 7075-T6 Alloy Open
The effect of ultrasonic shot peening on the environmental hydrogen embrittlement behavior of the 7075-T6 aluminum alloy is investigated. The 7075-T6 tensile specimens were treated by ultrasonic shot peening for 50 s. Surface residual stre…
View article: Al-Zn-Mg系合金冷間圧延材の機械的特性に及ぼす溶体化処理温度の影響
Al-Zn-Mg系合金冷間圧延材の機械的特性に及ぼす溶体化処理温度の影響 Open
View article: Effect of solution treatment temperature on mechanical properties of cold-rolled Al-Zn-Mg alloy
Effect of solution treatment temperature on mechanical properties of cold-rolled Al-Zn-Mg alloy Open
The 7000 series alloys have the highest strength in the aluminum alloys, which have been originally designed as precipitationhardness alloys. However, environmental embrittlement of these high-strength alloys is a practical problem which i…
View article: Effect of aging conditions on resistance to hydrogen embrittlement of 2219 aluminum alloy
Effect of aging conditions on resistance to hydrogen embrittlement of 2219 aluminum alloy Open
The 2219 aluminum alloy has been used in aircraft components, liquid oxygen tank for rockets, etc. In general, agehardened Al-Cu alloys, called 2000 series aluminum alloys, are known to have high strength. So far, the effects of heat treat…