Microstructure evolution and impact toughness variation for high strength steel multi-pass weld metals with various cooling rates

2021 ◽  
Vol 65 ◽  
pp. 245-257
Author(s):  
Wei Li ◽  
Rui Cao ◽  
Wanchao Zhu ◽  
Xili Guo ◽  
Yong Jiang ◽  
...  
Keyword(s):  
Impact Toughness ◽  
Microstructure Evolution ◽  
High Strength Steel ◽  
High Strength ◽  
Cooling Rates ◽  
Weld Metals ◽  
Toughness Variation

Microstructure and impact toughness of high strength steel weld metals deposited by MCAW-RE process using different shielding gases

2021 ◽  
Author(s):  
Walker A. S. Filho ◽  
Guilherme M. S. Silveira ◽  
Jeferson F. M. Costa ◽  
Matheus C. Mendes ◽  
Luís Felipe G. de Souza ◽  
...  
Keyword(s):  
Impact Toughness ◽  
High Strength Steel ◽  
High Strength ◽  
Shielding Gases ◽  
Steel Weld ◽  
Weld Metals

Comparative study of high-strength steel weld metals obtained by the SMAW and FCAW processes for offshore applications and mooring chains

2010 ◽  
Vol 24 (12) ◽  
pp. 903-910 ◽  
Author(s):  
Humberto N. Farneze ◽  
Jorge Carlos F. Jorge ◽  
Luís Felipe G. de Souza ◽  
Ivaní de S. Bott
Keyword(s):  
Comparative Study ◽  
High Strength Steel ◽  
High Strength ◽  
Steel Weld ◽  
Weld Metals

The Influence of Thermomechanical Controlled Processing on Bainite Formation in Low Carbon High Strength Steel

2014 ◽  
Vol 783-786 ◽  
pp. 21-26
Author(s):  
Xiao Jun Liang ◽  
Ming Jian Hua ◽  
Anthony J. DeArdo
Keyword(s):  
Mechanical Properties ◽  
High Strength Steel ◽  
High Strength ◽  
Manganese Steel ◽  
Low Carbon ◽  
High Manganese ◽  
Bainite Transformation ◽  
High Manganese Steel ◽  
Cooling Rates ◽  
Controlled Processing

Thermomechanical controlled processing is a very important way to control the microstructure and mechanical properties in low carbon, high strength steel. This is especially true in the case of bainite formation, where the complexity of the austenite-bainite transformation makes the control of the processing important. In this study, a low carbon, high manganese steel containing niobium was investigated to better understand the roles of austenite conditioning and cooling rates on the bainitic phase transformation. Specimens were compared with and without deformation, and followed by seven different cooling rates ranging between 0.5°C/s and 40°C/s. The CCT curves showed that the transformation behaviors and temperatures are very different. The different bainitic microstructures which varied with austenite deformation and cooling rates will be discussed.

3D FEM Simulation of the Effect of Cooling Rate on SDAS and Macrosegregation of a High Strength Steel

2018 ◽  
Vol 941 ◽  
pp. 2360-2364 ◽  
Author(s):  
Gary Brionne ◽  
Abdelhalim Loucif ◽  
Chun Ping Zhang ◽  
Louis Philippe Lapierre-Boire ◽  
Mohammad Jahazi
Keyword(s):  
Boundary Conditions ◽  
Mushy Zone ◽  
Cooling Rate ◽  
High Strength Steel ◽  
Fem Simulation ◽  
High Strength ◽  
3D Fem ◽  
Cooling Rates ◽  
Positive Segregation ◽  
The Difference

Secondary dendrite arm spacing (SDAS) is a macrosegregation parameter directly linked to content of macrosegregation through cooling rates. The aim of this paper is to highlight the effect of cooling rate on the SDAS and macrosegregation patterns in a high strength steel. For this purpose, directionnal solidification in a cylinder was modeled with a plane-front solidification. Two cylinders were modeled with different boundary conditions (Tsurface = 1000°C and 1200°C). Using the FEM software Thercast, 3D macrosegregation maps were generated with thermomechanic algorithm taking into account metal shrinkage. Using Won’s equation, the influence of cooling rates in the mushy zone on SDAS was determined. The results indicated that a 72% lower difference in the area of negative macrosegregation zone (macrosegregation ratio (rseg) < -0.016%) for lower cooling rate (Ts = 1200°C). The difference of the area for positive segregation was 85% lower for higher cooling rates.

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