Prediction of hardness distribution in steel heat affected zone

1999 ◽  
Vol 4 (5) ◽  
pp. 265-275 ◽  
Author(s):  
T. Kasuya ◽  
Y. Hashiba
Keyword(s):  
Heat Affected Zone ◽  
Hardness Distribution ◽  
Steel Heat

Study on the Toughness of X100 Pipeline Steel Heat Affected Zone

2015 ◽  
pp. 597-604 ◽  
Author(s):  
Xueda Li ◽  
Chengjia Shang ◽  
Xiaoping Ma ◽  
S.V. Subramanian
Keyword(s):  
Heat Affected Zone ◽  
Pipeline Steel ◽  
X100 Pipeline Steel ◽  
Steel Heat

Investigations on the Hardness Distribution and Microstructure of Friction-Stir-Welded 6082 Aluminum Alloy

2020 ◽  
Vol 993 ◽  
pp. 116-122
Author(s):  
Kun Yuan Gao ◽  
Bo Li ◽  
Yu Sheng Ding ◽  
Hui Huang ◽  
Sheng Ping Wen ◽  
...  
Keyword(s):  
Grain Size ◽  
Aluminum Alloy ◽  
Grain Boundaries ◽  
Base Metal ◽  
Heat Affected Zone ◽  
Hardness Distribution ◽  
Secondary Phases ◽  
Friction Stir ◽  
Β Phase ◽  
6082 Aluminum Alloy

The hardness and microstructure of friction stir welded (FSW) 6082 aluminum alloy joint were investigated by Vickers microhardness test, optical microscopy (OM), electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The hardness distribution is in a W shape, and from the base metal to the heat affected zone (HAZ) the hardness decreases from 103 HV to 72 HV, then gradually increases to 84 HV at the nugget zone (NZ). The grains of base metal (BM) are elongated and composed of a great quantity of low-angle grain boundaries. The nugget zon was of quite fine recrystallized grains. For the thermomechanical affected zone (TMAZ), the grain size is a little smaller than that of base metal and some low-angle grain boundaries remain. In the heat affected zone, the grain size was similar to that of the base metal. The β'' phase (Mg5Si6) and Al-Mn-Si particles are dispersed in the base metal. . In the heat affected zone, β'' phase transforms to β' phase (Mg9Si5). The hardness distribution in a W-shape was discussed on the basis of grain size, density of low-angle grain boundary and secondary phases.

Effect of Heat Input on the Microstructure of Ultra-Narrow Gap Welded NK-HITEN610U2 Steel Heat Affected Zone

2013 ◽  
Vol 333-335 ◽  
pp. 1967-1970
Author(s):  
Xuan Zhao ◽  
Ke Jie Dai ◽  
Fu Ju Zhang
Keyword(s):  
Heat Affected Zone ◽  
Heat Input ◽  
Hardness Test ◽  
Narrow Gap ◽  
Weld Joints ◽  
Welding Heat Input ◽  
Steel Heat

Effect of welding heat input on the microstructure of the automatic ultra-narrow gap welded NK-HITEN610U2 steel heat affected zone (HAZ) was studied. Five heat input combinations (6kj/cm, 10kj/cm, 14kj/cm, 18kj/cm, 22kj/cm) were designated for the research. The weld joints made using these five combinations were subjected to micro-structural evaluations and hardness test for analyze the effect of the heat input on the microstructure. The results indicated that the width of heat affected zone increased with increase in the heat input.

Improvement of weldability and evaluation criteria for high-strength pipe steel heat-affected zone reliability

Metallurgist ◽  
2012 ◽  
Vol 55 (11-12) ◽  
pp. 925-934 ◽  
Author(s):  
I. L. Permyakov ◽  
I. I. Frantov ◽  
A. N. Bortsov ◽  
K. Yu. Mentyukov
Keyword(s):  
Heat Affected Zone ◽  
Pipe Steel ◽  
Evaluation Criteria ◽  
High Strength ◽  
Steel Heat

scholarly journals Microstructure Evolution and Distribution of Mechanical Properties in Shielded Metal Arc Welded Dissimilar DSS 2205 and HY80 Joints

2019 ◽  
Vol 269 ◽  
pp. 06004
Author(s):  
Sunoto Mudiantoro ◽  
Winarto Winarto ◽  
Herry Oktadinata
Keyword(s):  
Weld Metal ◽  
Base Metal ◽  
Microstructure Evolution ◽  
Heat Affected Zone ◽  
Steel Plate ◽  
Fusion Line ◽  
Dissimilar Welding ◽  
Hardness Distribution ◽  
Butt Weld ◽  
Coarse Grains

Dissimilar welding is a unique and complex process because in each zone in the different welding area have unique structures and characteristics. The modified structure may have a significant effect on weld metal properties. In this research, the primary objective is to investigate the microstructure evolution and hardness distribution mode of a different joint HY80 steel plate and Duplex type 2205 welded by using thick weld or shielded metal arc weld (SMAW). The microstructure of weld metal zones was observed. The test plates were welded in both butt joint and fillet joint by using E309L filler metal. It was found that the 309L electrode provides the equilibrium between austenite and ferrite phase in the different weld metal zones of DSS 2205 and HY80 steel joint. The results show that hardness distribution of different joint of both butt weld and fillet weld presents sinusoidal trend, where hardness in HAZ is highest. The peak value of hardness appeared in HY 80 base metal near the fusion line. The microstructure of base metal DSS 2205 shows fine grains of ferrite and austenite grains with dark and light shades respectively. The microstructure of weld metal shows coarse grains of austenite along with some slag inclusions as dark spots. The Heat Affected Zone of HY80 steel plate shows coarse grains of austenite and ferrite, while the heat affected zone of DSS 2205 shows thin fusion line with coarse grains of ferrite as dark zones and coarse grains of austenite as light zones. There is, a degree of variation in weld metal ferrite content was observed. Keywords: Duplex Stainless Steel, HY80, SMAW, Dissimilar Joint, Hardness, and Impact Toughness.

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