Analysis of interface migration and isothermal martensite formation for quenching and partitioning process in a low-carbon steel by phase field modeling

2019 ◽  
Vol 27 (7) ◽  
pp. 075011 ◽  
Author(s):  
Xing Zhang ◽  
Gang Shen ◽  
Chuanwei Li ◽  
Jianfeng Gu
Keyword(s):  
Carbon Steel ◽  
Phase Field ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Martensite Formation ◽  
Phase Field Modeling ◽  
Interface Migration ◽  
Quenching And Partitioning ◽  
Field Modeling ◽  
Quenching And Partitioning Process

In Situ Observation and Phase-Field Modeling of Peritectic Solidification of Low-Carbon Steel

2019 ◽  
Vol 51 (2) ◽  
pp. 767-777 ◽  
Author(s):  
Sen Luo ◽  
Guangguang Liu ◽  
Peng Wang ◽  
Xiaohua Wang ◽  
Weiling Wang ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Phase Field ◽  
Low Carbon Steel ◽  
In Situ Observation ◽  
Low Carbon ◽  
Phase Field Modeling ◽  
Field Modeling ◽  
Peritectic Solidification

Microstructural development during the quenching and partitioning process in a newly designed low-carbon steel

2011 ◽  
Vol 59 (15) ◽  
pp. 6059-6068 ◽  
Author(s):  
M.J. Santofimia ◽  
L. Zhao ◽  
R. Petrov ◽  
C. Kwakernaak ◽  
W.G. Sloof ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Microstructural Development ◽  
Low Carbon ◽  
Quenching And Partitioning ◽  
Quenching And Partitioning Process

Microstructure and Mechanical Properties of a Low-Carbon Steel Treated by One-Step Quenching and Partitioning Process

2014 ◽  
Vol 1082 ◽  
pp. 202-207 ◽  
Author(s):  
Shu Yan ◽  
Xiang Hua Liu
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Microstructural Evolution ◽  
Retained Austenite ◽  
Uniform Elongation ◽  
Low Carbon Steel ◽  
Total Elongation ◽  
Low Carbon ◽  
Quenching And Partitioning ◽  
Partitioning Time

A low carbon steel was treated by quenching and partitioning (Q&P) process, and a detailed characterization of the microstructural evolution and testing of mechanical properties were carried out. The resulted mechanical properties indicate that with the partitioning time increasing, the tensile strength decreases rapidly first and then remains stable, and the total elongation increases first then decreases. The investigated steel subjected to Q&P process exhibits excellent products of strength and elongation (17.8-20.6 GPa•%). The microstructural evolution of martensite matrix during the partitioning step was observed, and the morphology and content of retained austenite were characterized. The working hardening behavior of the samples was analyzed, and the retained austenite with higher carbon content contributes to the uniform elongation more effectively.

scholarly journals Effect of Carbon Partitioning, Carbide Precipitation, and Grain Size on Brittle Fracture of Ultra-High-Strength, Low-Carbon Steel after Welding by a Quenching and Partitioning Process

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 747 ◽  
Author(s):  
Farnoosh Forouzan ◽  
M. Guitar ◽  
Esa Vuorinen ◽  
Frank Mücklich
Keyword(s):  
Grain Size ◽  
Carbon Steel ◽  
Weld Zone ◽  
Low Carbon Steel ◽  
High Strength ◽  
Precipitate Size ◽  
Low Carbon ◽  
Quenching And Partitioning ◽  
High Level ◽  
The Impact

To improve the weld zone properties of Advanced High Strength Steel (AHSS), quenching and partitioning (Q&P) has been used immediately after laser welding of a low-carbon steel. However, the mechanical properties can be affected for several reasons: (i) The carbon content and amount of retained austenite, bainite, and fresh martensite; (ii) Precipitate size and distribution; (iii) Grain size. In this work, carbon movements during the partitioning stage and prediction of Ti (C, N), and MoC precipitation at different partitioning temperatures have been simulated by using Thermocalc, Dictra, and TC-PRISMA. Verification and comparison of the experimental results were performed by optical microscopy, X-ray diffraction (XRD), Scanning Electron Microscop (SEM), and Scanning Transmission Electron Microscopy (STEM), and Energy Dispersive Spectroscopy (EDS) and Electron Backscatter Scanning Diffraction (EBSD) analysis were used to investigate the effect of martensitic/bainitic packet size. Results show that the increase in the number density of small precipitates in the sample partitioned at 640 °C compensates for the increase in crystallographic packets size. The strength and ductility values are kept at a high level, but the impact toughness will decrease considerably.

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