The influence of surface corrosion on microstructure and hydrogen permeability of Nb-Hf-Co dual-phase alloys

2021 ◽  
pp. 102951
Author(s):  
Hao Wang ◽  
Erhu Yan ◽  
Xingyue Wang ◽  
Wei Liu ◽  
Ping Zhao ◽  
...  
Keyword(s):  
Hydrogen Permeability ◽  
Dual Phase ◽  
Surface Corrosion

Optimization of Metallographic Sample Preparation for AFM/SKPFM Based Phase Distinction of Complex and Dual Phase High Strength Steels

2021 ◽  
Vol 58 (6) ◽  
pp. 308-331
Author(s):  
I. Traxler ◽  
G. Schimo-Aichhorn ◽  
A. Muhr ◽  
C. Commenda ◽  
A. Jerrar ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Hydrogen Permeability ◽  
High Strength Steels ◽  
High Strength ◽  
Dual Phase ◽  
Kelvin Probe ◽  
Preparation Methods ◽  
Force Microscopy ◽  
Steel Grades ◽  
The Individual

Abstract For the comprehensive investigation of advanced high strength steel grades, like complex and dual phase steels, Atomic Force Microscopy (AFM) and Scanning Kelvin Probe Force Microscopy (SKPFM) have proven to be useful tools, especially for analysis of hydrogen permeability of the individual steel phases. However, for these studies a preparation route, exposing the microstructure of the steel, is necessary. Various sample preparation methods were examined, focusing on electropolishing and sputtering, and the selected route was optimized to guarantee reproducibility and stability of the prepared surface. Electropolishing was shown to be highly efficient to selectively reveal the individual steel phases without introducing strong topographical features disturbing the AFM measurements. A subsequent sputtering step was introduced to improve the stability and preservability of the surface up to several months. Finally, distinction of the steel phases via AFM/SKPFM, was complemented and compared with results from EBSD and XRD.

Development of dual-phase V90Fe5Al5/Cu alloys for enhanced malleability and sustainable hydrogen permeability

2019 ◽  
Vol 591 ◽  
pp. 117325 ◽  
Author(s):  
Xinzhong Li ◽  
Feifei Huang ◽  
Yanqing Su ◽  
Jingjie Guo ◽  
Markus Rettenmayr ◽  
...  
Keyword(s):  
Hydrogen Permeability ◽  
Dual Phase ◽  
Cu Alloys

Hydrogen Permeability in a Stable Austenitic Stainless Steel

CORROSION ◽  
1966 ◽  
Vol 22 (9) ◽  
pp. 253-256 ◽  
Author(s):  
J. H. SHIVELY ◽  
R. F. HEHEMANN ◽  
A. R. TROIANO
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Hydrogen Embrittlement ◽  
Hydrogen Permeability ◽  
Permeation Rate ◽  
H2so4 Solution ◽  
Applied Current ◽  
Applied Current Density ◽  
Surface Corrosion ◽  
310 Stainless Steel

Abstract Tests at 21 C (69 F) show hydrogen enters and penetrates thin Type 310 stainless steel in H2SO4 solution under applied cathodic currents, first condition for hydrogen entry contributing to hydrogen embrittlement and stress corrosion cracking. When metal surface is passive permeation rate depends on applied current density; when active, rate depends on surface corrosion currents and applied current.

Effects of cooling rate on the mechanical properties of dual phase treated vanadium steels

1983 ◽  
Vol 41 ◽  
pp. 220-221
Author(s):  
L.J. Chen ◽  
H.C. Cheng ◽  
J.R. Gong ◽  
J.G. Yang
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Automobile Industry ◽  
High Strength ◽  
Weight Percent ◽  
Low Alloy Steels ◽  
Dual Phase ◽  
Resource Requirement ◽  
Alloy Steels ◽  
Potential Weight

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).

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