Influence of Vanadium on the Heat-Affected-Zone Properties of Mild Steel

Metal Science ◽  
1974 ◽  
Vol 8 (1) ◽  
pp. 228-234 ◽  
Author(s):  
N. E. Hannerz ◽  
B. M. Jonsson-Holmquist
Keyword(s):  
Mild Steel ◽  
Heat Affected Zone

Residual Stress Prediction in Welds via the Barkhausen Noise Technique

2011 ◽  
Vol 495 ◽  
pp. 209-212 ◽  
Author(s):  
Kalliroi Sapountzi
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Mild Steel ◽  
Heat Affected Zone ◽  
Barkhausen Noise ◽  
Stress Prediction ◽  
Steel Welds

Aim of this study was to evaluate the use of the Barkhausen Noise as a mean to detect the residual stresses developed in the heat-affected zone (HAZ) of mild steel welds.

Evaluating Microstructural and Hardness Variations in Time Dependent Multipass Welded Mild Steel

2009 ◽  
Vol 62-64 ◽  
pp. 345-351 ◽  
Author(s):  
Muhammed Olawale Hakeem Amuda ◽  
A.M. Oladoye ◽  
K. Ojemeni ◽  
J. Agunsoye ◽  
W. Subair
Keyword(s):  
Mild Steel ◽  
Fusion Zone ◽  
Heat Affected Zone ◽  
Plain Carbon Steel ◽  
Fine Grained ◽  
Interpass Time ◽  
Time Required ◽  
Welding Cycle ◽  
Crack Susceptibility ◽  
Hardness Values

This paper investigates the microstructural induced hardness variation in multirun welded plain carbon steel at different interpass time. Beveled 16mm thick mild steel samples were welded in 2 and 4 passes at interpass time of 90, 120 and 240s respectively via manual metal arc. The result showed that the differences in hardness values of the fusion zone and heat affected zone reduce as interpass time increases for both 2 and 4 runs. The effect was however quite distinct in the 4 runs welding cycle. In the 2 run cycle, the fusion zone and heat affected zone merge at 100 seconds; while in the 4 runs cycle, the merging occurred at 25 seconds; indicating that the higher the multipass, the shorter the time required to produce uniformity in hardness and structural homogeneity. Thereby increasing the resistance of the weld to crack susceptibility and failure. At these instances, the microstructure revealed fine grained pearlite interpassed in martensite.

scholarly journals A Cooks Distance Approach to Control the Haz and Arc Length of Tig Mild Steel Weld

2021 ◽  
Vol 6 (5) ◽  
pp. 141-145
Author(s):  
F. O. Uwoghiren ◽  
A. Ozigagun
Keyword(s):  
Mild Steel ◽  
Heat Affected Zone ◽  
Welding Process ◽  
Optimal Solution ◽  
Diagnostic Techniques ◽  
Vital Role ◽  
Arc Length ◽  
Normal Probability ◽  
Weld Structure ◽  
Rsm Model

The heat affected zone and arc length parameters have a vital role to play in determining the integrity of a weld structure. The cooks distance is a statistical diagnostic employed in this study to select the best optimum combination of welding process parameters. Mild steel plate was the choice material used to produce the weld specimen, which was welded with the Tungsten inert gas method. The RSM model was used to develop an optimal solution that can explain the behavior of the welded joint with respect to the heat affected zone and arc length, different diagnostic techniques were employed which includes the normal probability plot and cooks distance plot. The model developed has sufficient merit as the results obtained shows that the cooks distance values is within the range of 0 and 1 indicating the absence of outlier in the data making the optimal solution highly acceptable.

scholarly journals Factorial Analysis of Welding Current Influence on Heat Affected Zone Hardness of Cast Iron, Aluminium, and Mild Steel Weldments Cooled in Palm Oil

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
C. I. Nwoye ◽  
J. U. Odo ◽  
E. M. Ameh ◽  
S. O. Nwakpa
Keyword(s):  
Cast Iron ◽  
Mild Steel ◽  
Palm Oil ◽  
Heat Affected Zone ◽  
Computational Analysis ◽  
Welding Current ◽  
Factorial Analysis ◽  
Maximum Deviation ◽  
Product Rule ◽  
Current Product

Factorial analysis of heat affected zone hardness of some metals was evaluated. Three models were derived and used as tools for evaluating the welding current influence on the predictability of HAZ hardness in aluminium, cast iron, and mild steel weldments similarly cooled in palm oil. It was discovered that on welding these materials, and similarly cooling their respective weldments in palm oil, the model predicts aluminium weldment HAZ hardness by multiplying the determined general current product rule (GCPR) with the ratio: HAZ hardness product of cast iron and mild steel/HAZ hardness sum of cast iron and mild steel . Computational analysis of experimental and model-predicted results indicates that aluminium, cast iron, and mild steel weldment HAZ hardness per unit welding current as evaluated from experiment and derived model are 3.3917, 4.8333, and 2.7944 and 3.3915, 4.8335, and 2.7946 (VHN) A−1, respectively. Deviational analysis shows that the maximum deviation of model-predicted HAZ hardness from the experimental results is less than 0.007%. This invariably implies over 99.99 % confidence level for the derived models.

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