The corrosion and mechanical properties of Al alloy 5083-H116 in metal inert gas welding based on slow strain rate test

2010 ◽  
Vol 205 ◽  
pp. S73-S78 ◽  
Author(s):  
Seong-Jong Kim ◽  
Seong-Kweon Kim ◽  
Jae-Cheul Park
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Slow Strain Rate ◽  
Inert Gas ◽  
Slow Strain Rate Test ◽  
Al Alloy ◽  
Rate Test ◽  
Metal Inert Gas Welding

The study of hydrogen embrittlement of 12Cr2Mo1R(H) steel by slow strain rate test with in situ hydrogen charging

2019 ◽  
Vol 66 (5) ◽  
pp. 556-564
Author(s):  
Kun Zhang ◽  
Yicheng Fan ◽  
Xiaowei Luo ◽  
Xiaolang Chen ◽  
Chaolei Ban ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Embrittlement ◽  
Strain Rate ◽  
Slow Strain Rate ◽  
Slow Strain Rate Test ◽  
Strain Rates ◽  
Content Type ◽  
Hydrogen Charging ◽  
Rate Test

Purpose 12Cr2Mo1R(H) steel is commonly used to make hot-wall hydrogenation reactors given its excellent mechanical properties and hydrogen embrittlement (HE) resistance. Longtime exposure to high-pressure hydrogen at medium temperature would still severely damage the mechanical properties of the Cr-Mo steel with surface HICs caused by hydrogen adsorption and hydrogen uptake. The mechanisms of HE remain controversial and have not been fully understood so far. Design/methodology/approach The HE of the steel was investigated by slow strain rate test at different strain rates with in situ hydrogen charging. The diffusion coefficient of hydrogen in the steel is measured by electrochemical technology of hydrogen permeation. HIC cracks of the fractured specimens were captured with field emission SEM equipped with an electron backscatter diffraction system. Findings Results showed that the hydrogen led to the plasticity of the samples reduced significantly, together with the distinct work hardening behavior induced by hydrogen charging during plastic flow stage. The fracture of in situ charged sample changes from quasi-cleavage to intergranular fracture with the decreasing of strain rates, which indicates that the steel become more susceptible to hydrogen. High densities of dislocations and deformation are found around the crack, where grains are highly sensitive to HIC. Grains with different Taylor factor are more susceptible to intergranular crack. Originality/value The results of the study would be helpful to a safer application of the steel.

Hydrogen analysis and slow strain rate test in Ar gas for irradiated austenitic stainless steel

2001 ◽  
Vol 294 (3) ◽  
pp. 241-249 ◽  
Author(s):  
J Morisawa ◽  
M Kodama ◽  
N Yokota ◽  
K Nakata ◽  
K Fukuya ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Strain Rate ◽  
Slow Strain Rate ◽  
Slow Strain Rate Test ◽  
Hydrogen Analysis ◽  
Rate Test ◽  
Ar Gas

Application of Visual Basic in Fluctuant Slow Strain Rate Test

2014 ◽  
Vol 556-562 ◽  
pp. 3291-3294 ◽  
Author(s):  
Qi Lei Sun ◽  
Lu Dan Shi ◽  
Ze Rui Liu
Keyword(s):  
Strain Rate ◽  
Corrosion Test ◽  
Pipeline Steel ◽  
Visual Basic ◽  
Slow Strain Rate ◽  
Language Design ◽  
Slow Strain Rate Test ◽  
Language Program ◽  
Natural Gas Pipeline ◽  
Rate Test

With the example of stress corrosion test of natural gas pipeline steel, the application of Visual Basic (VB) language program in the test will be discussed in the paper. The result shows that different waveforms of VB language design can simulate various forms of applied load of pipeline steel well, and make fluctuant slow strain rate test more accurate and convenient.

Determination of Stress Corrosion Cracking Resistance of Al-Cu-Mg Alloys by Slow Strain Rate and Alternate Immersion Testing

CORROSION ◽  
1981 ◽  
Vol 37 (2) ◽  
pp. 98-103 ◽  
Author(s):  
Shantanu Maitra
Keyword(s):  
Strain Rate ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Slow Strain Rate ◽  
Test Method ◽  
Slow Strain Rate Test ◽  
Test Results ◽  
Alloy Plate ◽  
Rate Test

Abstract Increased artificial aging from the T351 temper to T851 temper is known to increase resistance to stress corrosion cracking (SCO for Al-Cu-Mg alloy 2124. A series of incrementally aged 2124 alloy plate was tested for resistance to SCC by the slow strain rate technique and by the conventional alternate immersion test method. It is shown that slow strain rate test results are in agreement with the conventional test results. Using fracture energy and other loss in ductility parameters to denote resistance to SCC, it has been shown that this technique can be used as a more accurate SCC test. SEM examinations of fracture surfaces confirm the SCC indices obtained by the slow strain rate test.

Stress Corrosion Behavior of AISI 304 Stainless Steel in a Boiling 42% MgCl2 Solution under Cyclic Slow Strain Rate Technique

CORROSION ◽  
1985 ◽  
Vol 41 (10) ◽  
pp. 592-597 ◽  
Author(s):  
T. Nakayama ◽  
M. Takano
Keyword(s):  
Stainless Steel ◽  
Strain Rate ◽  
Stress Corrosion ◽  
Slow Strain Rate ◽  
304 Stainless Steel ◽  
Slow Strain Rate Test ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Rate Test ◽  
Slow Strain Rate Technique

Abstract Stress corrosion cracking (SCC) behavior of AISI 304 stainless steel (SS) rod and plate specimens in boiling 42% MgCl2 was investigated using a monotonic and a cyclic slow strain rate technique (SSRT) in the crosshead speed (CHS) range from 6×10−5 to 1.5 mm/min. A maximum stress (σmax) of 50 to 330 MPa was selected in a cyclic slow strain rate test. A thermal cyclic stress test was also conducted in the solution. Fracture surface observations revealed that crack mode changed from transgranular to intergranular with increasing stress level in the SCC process, and the crack mode was independent of the CHS change. Time to failure in the cyclic slow strain rate test was constant at a given σmax in all CHS used (except slow CHS of 6×10−5 at σmax of 50 MPa). Crack propagation rate (da/dt) increased with the stress intensity factor, and it was independent of CHS. The corrosion potential varied with the stress cycle after cracking started; this indicated that SCC proceeded by a dissolution-repassivation mechanism. The cyclic slow strain rate test is recommended as an SCC test that can reproduce the actual service conditions of stress.

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