Residual Stress Measurement and the Slitting Method

2007 ◽  
Keyword(s):  
Residual Stress ◽  
Stress Measurement ◽  
Residual Stress Measurement ◽  
Slitting Method

Numerical and Experimental Study of the Plasticity Effect on Residual Stress Measurement Using Slitting Method

2013 ◽  
Vol 768-769 ◽  
pp. 107-113
Author(s):  
Amir Hossein Mahmoudi ◽  
Soroush Heydarian ◽  
Kourosh Behnam
Keyword(s):  
Residual Stress ◽  
Stress Measurement ◽  
Mechanical Strain ◽  
Residual Stress Measurement ◽  
Stress Fields ◽  
Element Analysis ◽  
Plasticity Effect ◽  
Slitting Method ◽  
Quenching Process ◽  
Temperature Levels

Residual Stress measurement has gained interests among researchers for many years. Slitting method is one of the destructive techniques that relies on the introduction of an increasing cut to a part containing residual stresses. Similar to all other mechanical strain relief techniques, slitting suffers from the level of plasticity occurs within the sample while cutting. In the present research, slitting method was simulated using finite element analysis. The correct performance of the slitting method procedure was explored using known residual stress fields. Then, simulations of the quenching process of beam samples were performed for three different temperature levels; 400°C, 600°C and 850°C. The experimental procedures of the slitting method on the quenched samples at these temperatures were then carried out. The influence of three stress levels on the ability of the slitting method was discussed. Interesting results were observed.

Noise-insensitive contour method for residual stress measurement in laser butt welding

2021 ◽  
Vol 165 ◽  
pp. 107861
Author(s):  
Hao Jiang ◽  
Junjun Liu ◽  
Zhenkun Lei ◽  
Ruixiang Bai ◽  
Zhenfei Guo ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stress Measurement ◽  
Residual Stress Measurement ◽  
Contour Method ◽  
Butt Welding

Analysis of Eddy-Current Measurement System for Residual Stress Assessment in Stainless Steel Grade 304

2015 ◽  
Vol 659 ◽  
pp. 623-627 ◽  
Author(s):  
Cherdpong Jomdecha ◽  
Isaratat Phung-On
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Eddy Current ◽  
Measurement System ◽  
System Analysis ◽  
Stress Measurement ◽  
Steel Grade ◽  
Current Measurement ◽  
Residual Stress Measurement ◽  
Stress Assessment

The objective of this paper is an analysis of statistical discreteness and measurement capability of an eddy-current measurement system for residual stress assessment in stainless steel Grade 304 (SS304). Cylindrical specimens with 50 mm in diameter and 12 mm thickness were prepared to generate residual stress by Resistance Spot Welding at which the welding currents were set at 12, 14, and 16 kA. The eddy-current measurement system was including a probe with frequency range of 0.1 to 3 MHz and an eddy current flaw detector. They were performed by contacting the probe on the specimen. The measurements were performed particularly in the vicinity of heat affected zone (HAZ). In order to determine the results of the residual stress measurement, the calibration curves between static tensile stress and eddy current impedance at various frequencies were accomplished. The Measurement System Analysis (MSA) was utilized to evaluate the changed eddy-current probe impedance from residual stress. The results showed that using eddy current technique at 1 MHz for residual stress measurement was the most efficient. It can be achieved the Gauge Repeatability & Reproducibility %GR&R at 16.61479 and Number of Distinct Categories (NDC) at 8. As applied on actual butt welded joint, it could yield the uncertainty of ± 58 MPa at 95 % (UISO).

Residual stress measurement on welded specimen by neutron diffraction

2004 ◽  
Vol 155-156 ◽  
pp. 1171-1177 ◽  
Author(s):  
Man Jin Park ◽  
Hee Nam Yang ◽  
Dong Y. Jang ◽  
Jong Sung Kim ◽  
Tae Eun Jin
Keyword(s):  
Residual Stress ◽  
Neutron Diffraction ◽  
Stress Measurement ◽  
Residual Stress Measurement
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