Influence of the Phosphorus Content on the Hydrogen Embrittlement Susceptibility of Some DP Steels Studied Using the Linearly Increasing Stress Test

2021 ◽  
Author(s):  
Futao Dong ◽  
Jeffrey Venezuela ◽  
Huixing Li ◽  
Zhiming Shi ◽  
Qingjun Zhou ◽  
...  
Keyword(s):  
Hydrogen Embrittlement ◽  
Phosphorus Content ◽  
Stress Test ◽  
Dp Steels

KME Cu-DHP

Alloy Digest ◽  
2021 ◽  
Vol 70 (8) ◽  
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Hydrogen Embrittlement ◽  
Physical Properties ◽  
Tensile Properties ◽  
Phosphorus Content ◽  
Heat Treating ◽  
Bend Strength ◽  
Residual Phosphorus ◽  
High Phosphorus Content

Abstract KME Cu-DHP is a phosphorus-deoxidized copper that contains a minimum of 99.90% copper and high residual phosphorus. The electrical conductivity of this type of copper is relatively low on account of the high phosphorus content. KME Cu-DHP possesses very good formability and joining properties and is resistant against hydrogen embrittlement. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and bend strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-923. Producer or source: KME Germany GmbH.

scholarly journals Effect of Phosphorus Content on Hydrogen Embrittlement for High Strength Steel Treated with Electroless Ni–P Plating

2021 ◽  
Vol 62 (1) ◽  
pp. 75-81
Author(s):  
Makoto Hino ◽  
Yuho Doi ◽  
Ryoichi Kuwano ◽  
Yukinori Oda ◽  
Keitaro Horikawa
Keyword(s):  
Hydrogen Embrittlement ◽  
High Strength Steel ◽  
Phosphorus Content ◽  
High Strength ◽  
Electroless Ni

scholarly journals Hydrogen Diffusion and Its Effect on Hydrogen Embrittlement in DP Steels With Different Martensite Content

2020 ◽  
Vol 7 ◽  
Author(s):  
Zhen Wang ◽  
Jing Liu ◽  
Feng Huang ◽  
Yun-jie Bi ◽  
Shi-qi Zhang
Keyword(s):  
Hydrogen Embrittlement ◽  
Hydrogen Diffusion ◽  
Hydrogen Permeation ◽  
Hydrogen Atoms ◽  
Martensite Content ◽  
Measurement Results ◽  
Dp Steels ◽  
Logarithmic Relationship ◽  
Diffusion Of Hydrogen ◽  
Effective Hydrogen

The hydrogen diffusion behavior and hydrogen embrittlement susceptibility of dual phase (DP) steels with different martensite content were investigated using the slow strain-rate tensile test and hydrogen permeation measurement. Results showed that a logarithmic relationship was established between the hydrogen embrittlement index (IHE) and the effective hydrogen diffusion coefficient (Deff). When the martensite content is low, ferrite/martensite interface behaves as the main trap that captures the hydrogen atoms. Also, when the Deff decreases, IHE increases with increasing martensite content. However, when the martensite content reaches approximately 68.3%, the martensite grains start to form a continuous network, Deff reaches a plateau and IHE continues to increase. This is mainly related to the reduction of carbon content in martensite and the length of ferrite/martensite interface, which promotes the diffusion of hydrogen atoms in martensite and the aggregation of hydrogen atoms at the ferrite/martensite interface. Finally, a model describing the mechanism of microstructure-driven hydrogen diffusion with different martensite distribution was established.

Effect of vanadium and rare earth microalloying on the hydrogen embrittlement susceptibility of a Fe-18Mn-0.6C TWIP steel studied using the linearly increasing stress test

2021 ◽  
pp. 109440
Author(s):  
Futao Dong ◽  
Jeffrey Venezuela ◽  
Huixing Li ◽  
Zhiming Shi ◽  
Qingjun Zhou ◽  
...  
Keyword(s):  
Rare Earth ◽  
Hydrogen Embrittlement ◽  
Twip Steel ◽  
Stress Test

scholarly journals Effect of Phosphorus Content on Hydrogen Embrittlement for High Strength Steel Treated with Electroless Ni-P Plating

2020 ◽  
Vol 84 (3) ◽  
pp. 80-86
Author(s):  
Makoto Hino ◽  
Yuho Doi ◽  
Ryoichi Kuwano ◽  
Yukinori Oda ◽  
Keitaro Horikawa
Keyword(s):  
Hydrogen Embrittlement ◽  
High Strength Steel ◽  
Phosphorus Content ◽  
High Strength ◽  
Electroless Ni

scholarly journals Analysis of Hydrogen Embrittlement on Aluminum Alloys for Vehicle-Mounted Hydrogen Storage Tanks: A Review

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1303
Author(s):  
Yizhe Chen ◽  
Shilong Zhao ◽  
Huijuan Ma ◽  
Hui Wang ◽  
Lin Hua ◽  
...  
Keyword(s):  
High Pressure ◽  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Hydrogen Embrittlement ◽  
Hydrogen Storage ◽  
Stress Test ◽  
Slow Strain Rate Test ◽  
Storage Tanks ◽  
Prevention Measures ◽  
Pressure Hydrogen

High-pressure hydrogen tanks which are composed of an aluminum alloy liner and a carbon fiber wound layer are currently the most popular means to store hydrogen on vehicles. Nevertheless, the aluminum alloy is easily affected by high-pressure hydrogen, which leads to the appearance of hydrogen embrittlement (HE). Serious HE of hydrogen tank represents a huge dangers to the safety of vehicles and passengers. It is critical and timely to outline the mainstream approach and point out potential avenues for further investigation of HE. An analysis, including the mechanism (including hydrogen-enhanced local plasticity model, hydrogen-enhanced decohesion mechanism and hydrogen pressure theory), the detection (including slow strain rate test, linearly increasing stress test and so on) and methods for the prevention of HE on aluminum alloys of hydrogen vehicles (such as coating) are systematically presented in this work. Moreover, the entire experimental detection procedures for HE are expounded. Ultimately, the prevention measures are discussed in detail. It is believed that further prevention measures will rely on the integration of multiple prevention methods. Successfully solving this problem is of great significance to reduce the risk of failure of hydrogen storage tanks and improve the reliability of aluminum alloys for engineering applications in various industries including automotive and aerospace.

Experimental Research on Hydrogen Resistance Performance of Different Microstructure

2018 ◽  
Vol 932 ◽  
pp. 13-18
Author(s):  
Wen Bo Li ◽  
Jing Wang
Keyword(s):  
Hydrogen Embrittlement ◽  
Stress Test ◽  
Hydrogen Permeability ◽  
Hardness Test ◽  
Hydrogen Corrosion ◽  
Treatment Processes ◽  
Resistance Property ◽  
Resistance Performance ◽  
Hydrogen Resistance ◽  
Better Than

The paper studies the effects of different microstructures on the hydrogen resistance properties. Four kinds of microstructures were obtained by using four kinds of heat treatment processes for 45 steel materials. The mechanical properties of different microstructure materials were obtained by Vickers hardness test and internal residual stress test. The relationships between hardness and depth of four kinds of microstructures were obtained by stratified microhardness test. Static hydrogen resistance property of different microstructures was obtained by using the stripping method. Results show that the H2S corrosion layer of different microstructures is basically the same, and the depth and hardness distribution of the hydrogen embrittlement layer are quite different. More pearlite, lead to the weakness of hydrogen resistance property; quenched and tempered sorbite after the hydrogen corrosion is better than ferrite + pearlite structure, martensite has a good resistance to hydrogen permeability. Finally, the relationships between microhardness and depth of the hydrogen embrittlement layer with different microstructures were fitted.

Transcription factor/DNA interactions visualized by electron spectroscopic imaging

1992 ◽  
Vol 50 (1) ◽  
pp. 450-451
Author(s):  
David P. Bazett-Jones ◽  
Mark L. Brown
Keyword(s):  
Transcription Factor ◽  
Dna Sequences ◽  
Transcription Initiation ◽  
Molecular Mechanisms ◽  
Phosphorus Content ◽  
Spectroscopic Imaging ◽  
Electron Spectroscopic Imaging ◽  
Dna Backbone ◽  
Two Parameters ◽  
High Level

A multisubunit RNA polymerase enzyme is ultimately responsible for transcription initiation and elongation of RNA, but recognition of the proper start site by the enzyme is regulated by general, temporal and gene-specific trans-factors interacting at promoter and enhancer DNA sequences. To understand the molecular mechanisms which precisely regulate the transcription initiation event, it is crucial to elucidate the structure of the transcription factor/DNA complexes involved. Electron spectroscopic imaging (ESI) provides the opportunity to visualize individual DNA molecules. Enhancement of DNA contrast with ESI is accomplished by imaging with electrons that have interacted with inner shell electrons of phosphorus in the DNA backbone. Phosphorus detection at this intermediately high level of resolution (≈lnm) permits selective imaging of the DNA, to determine whether the protein factors compact, bend or wrap the DNA. Simultaneously, mass analysis and phosphorus content can be measured quantitatively, using adjacent DNA or tobacco mosaic virus (TMV) as mass and phosphorus standards. These two parameters provide stoichiometric information relating the ratios of protein:DNA content.

Supplemental Arm Pumping Puts Adenosine Testing on Par With Exercise Stress Test

2006 ◽  
Vol 39 (21) ◽  
pp. 43
Author(s):  
PATRICE WENDLING
Keyword(s):  
Stress Test ◽  
Exercise Stress Test ◽  
Exercise Stress

Messung der Stimmfrequenz im Paargespräch – Chancen für Diagnostik und Intervention in der Paartherapie

2020 ◽  
Vol 68 (4) ◽  
pp. 217-227 ◽  
Author(s):  
Lisanne J. Bulling ◽  
Isabella C. Bertschi ◽  
Céline C. Stadelmann ◽  
Tina Niederer ◽  
Guy Bodenmann
Keyword(s):  
Social Stress ◽  
Stress Test ◽  
Trier Social Stress Test

Zusammenfassung. Die vorliegende Arbeit stellt die bisherigen empirischen Befunde zur Sprachgrundfrequenz (f0) in Paargesprächen vor und untersucht, wie sich die f0 nach einer experimentellen Stressinduktion im anschließenden spontanen Gespräch zwischen den Partner_innen verändert, wie die f0 mit der verbalen Stressäußerung zusammenhängt und wie sie zwischen den beiden Partner_innen kovariiert. Von 128 heterosexuellen Paaren nahm jeweils eine Person pro Paar am Trier Social Stress Test (TSST) teil. Die dem TSST vorangehende und anschließende naturalistische Interaktion zwischen den Partner_innen wurde gefilmt und nach Gesprächsthema und Art der Stressäußerung kodiert. Wie vorherige Studien zur f0 im Paargespräch zeigte auch die vorliegende Studie, dass die f0 wichtige Informationen über die Partnerschaft enthält. Während eine Erhöhung der f0 in Gesprächen über einen paarinternen Stressor (d.h. bei Konfliktgesprächen) mit negativen Kommunikationsmustern einherging, zeigte die vorliegende Studie, dass die f0 bei Gesprächen über einen paarexternen Stressor (d.h. beim TSST) mit emotionsorientierten Stressäußerungen einherging, also einer für den Stressbewältigungsprozess förderlichen Art der Kommunikation. Die Oszillatorenmodelle zeigen darüber hinaus, dass eine Kopplung der f0 zwischen den Partner_innen besteht, was darauf hindeutet, dass die nicht gestressten Partner_innen auf die paraverbalen Stressäußerungen der gestressten Partner_innen mit ihren eigenen paraverbalen Stressäußerungen reagieren.

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