The Effect of Thermo-Mechanical Processing Parameters on Microstructure and Mechanical Properties of a Low Carbon, High Strength Steel

2013 ◽  
Vol 85 (3) ◽  
pp. 307-313 ◽  
Author(s):  
Da-Zhao Li ◽  
Yong-Chang Liu ◽  
Tian-Xie Cui ◽  
Jian-Min Li ◽  
Yu-Tian Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Strength Steel ◽  
High Strength ◽  
Processing Parameters ◽  
Mechanical Processing ◽  
Low Carbon ◽  
Microstructure And Mechanical Properties

scholarly journals Microstructure and Mechanical Properties of Low-Carbon High-Strength Steel Fabricated by Wire and Arc Additive Manufacturing

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 216
Author(s):  
Laibo Sun ◽  
Fengchun Jiang ◽  
Ruisheng Huang ◽  
Ding Yuan ◽  
Chunhuan Guo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
High Strength Steel ◽  
High Strength ◽  
Taylor Factor ◽  
Image Correlation ◽  
Experimental Fact ◽  
Fracture Mechanisms ◽  
Low Carbon ◽  
Microstructure And Mechanical Properties

Wire and arc additive manufacturing (WAAM) is a novel technique for fabricating large and complex components applied in the manufacturing industry. In this study, a low-carbon high-strength steel component deposited by WAAM for use in ship building was obtained. Its microstructure and mechanical properties as well as fracture mechanisms were investigated. The results showed that the microstructure consisted of an equiaxed zone, columnar zone, and inter-layer zone, while the phases formed in different parts of the deposited component were different due to various thermal cycles and cooling rates. The microhardness of the bottom and top varied from 290 HV to 260 HV, caused by temperature gradients and an inhomogeneous microstructure. Additionally, the tensile properties in transversal and longitudinal orientations show anisotropy characteristics, which was further investigated using a digital image correlation (DIC) method. This experimental fact indicated that the longitudinal tensile property has an inferior performance and tends to cause stress concentrations in the inter-layer areas due to the inclusion of more inter-layer zones. Furthermore, electron backscattered diffraction (EBSD) was applied to analyze the difference in Taylor factor between the inter-layer area and deposited area. The standard deviation of the Taylor factor in the inter-layer area was determined to be 0.907, which was larger than that in the deposited area (0.865), indicating nonuniform deformation and local stress concentration occurred in inter-layer area. Finally, as observed from the fracture morphology on the fractured surface of the sample, anisotropy was also approved by the comparison of the transversal and longitudinal tensile specimens.

Study of processing, microstructure and mechanical properties of hot rolled ultra-high strength steel

2018 ◽  
Vol 46 (6) ◽  
pp. 535-541 ◽  
Author(s):  
Tihe Zhou ◽  
David Overby ◽  
Peter Badgley ◽  
Chris Martin-Root ◽  
Xiang Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Strength Steel ◽  
High Strength ◽  
Microstructure And Mechanical Properties ◽  
Ultra High Strength Steel ◽  
Hot Rolled

Microstructure and Mechanical Properties of Laser Welded Joint of 800 MPa Grade Hot-Rolled High Strength Steel

2019 ◽  
Vol 46 (1) ◽  
pp. 0102002
Author(s):  
环鹏程 Huan Pengcheng ◽  
王晓南 Wang Xiaonan ◽  
朱天才 Zhu Tiancai ◽  
陈文刚 Chen Wengang ◽  
胡增荣 Hu Zengrong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Strength Steel ◽  
Welded Joint ◽  
High Strength ◽  
Microstructure And Mechanical Properties ◽  
Hot Rolled

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.

scholarly journals Impact of Cold-Rolling and Heat Treatment on Mechanical Properties of Dual-Phase Treated Low Carbon Steel

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Le Van Long ◽  
Dinh Van Hien ◽  
Nguyen Truong Thanh ◽  
Nguyen Chi Tho ◽  
Van Thom Do
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
High Strength ◽  
Processing Parameters ◽  
Dual Phase ◽  
Low Carbon ◽  
Forming Process ◽  
Good Ductility ◽  
Rolling Deformation

The low carbon steel has good ductility that is favorable for forming process, but its low strength leads to limiting their application for forced structures. This paper studied improving strength of low-carbon steel via rolling deformation and dual-phase treatment. The results showed that the dual-phase treated steel had a combination of high strength and good ductility; its tensile ultimate strength reached 740 MPa with elongation at fracture of over 15%, while that of the cold-rolled steel only reached 700 MPa with elongation at fracture of under 3%. Based on the obtained results, relationships between mechanical properties and dual-phase processing parameters were established to help users choose suitable-processing parameters according to requirements of products.

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