Effects of strain aging on fracture of low-alloy steels with different structure

2019 ◽  
pp. 11-19
Author(s):  
E. A. Yakovleva ◽  
G. D. Motovilina ◽  
E. I. Khlusova
Keyword(s):  
Thermomechanical Treatment ◽  
Fracture Mechanism ◽  
Strain Aging ◽  
Lattice Defect ◽  
Structural Instability ◽  
Production Cycle ◽  
Low Alloy Steels ◽  
Treatment Results ◽  
Bainite Structure ◽  
Alloy Steels

Low-alloy shipbuilding and pipeline steels are commonly subjected to thermomechanical treatment in order to form a ferrite-pearlite or ferrite-bainite structure. At the same time, a high density of lattice defect appearing in this treatment results in some structural instability fraught with the following aging in the production cycle or during the storage and exploitation. The present paper considers effects of the strain aging on steel fracture mechanism as well as efficient ways to reduce such effects. 

Effect of Aging Regimes on the Fracture Mechanism of Low-Alloy Steels with Different Structures

2020 ◽  
Vol 11 (6) ◽  
pp. 1280-1285
Author(s):  
G. D. Motovilina ◽  
E. A. Yakovleva ◽  
E. I. Khlusova
Keyword(s):  
Fracture Mechanism ◽  
Low Alloy Steels ◽  
Alloy Steels

scholarly journals Segregations in Steels during Heat Treatment – A Consideration along the Process Chain

2021 ◽  
Vol 76 (2) ◽  
pp. 79-104
Author(s):  
M. Hunkel
Keyword(s):  
Heat Treatment ◽  
Low Alloy Steels ◽  
Ingot Casting ◽  
Process Chain ◽  
Treatment Results ◽  
Entire Process ◽  
Alloy Steels ◽  
Inhomogeneous Microstructure

Abstract Segregation is an unavoidable phenomenon in continuous or ingot casting of steel for thermodynamic reasons. If costly processes that explicitly reduce segregation are not carried out, the segregations remain until the final product. Therefore, an understanding of the development and effects of segregation along the entire process chain is necessary. The focus in this publication is on the treatment of segregations in low alloy steels. First, the characterisation of segregation is presented. An overview of the formation and development of segregations during primary shaping and forming processes is given. The focus is on segregation-related effects during heat treatment with regard to inhomogeneous microstructure and negative heat treatment results such as distortion or hardening cracks. In a short outlook, the influence of segregation on the component behaviour is described. ◼

Effects of cooling rate on the mechanical properties of dual phase treated vanadium steels

1983 ◽  
Vol 41 ◽  
pp. 220-221
Author(s):  
L.J. Chen ◽  
H.C. Cheng ◽  
J.R. Gong ◽  
J.G. Yang
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Automobile Industry ◽  
High Strength ◽  
Weight Percent ◽  
Low Alloy Steels ◽  
Dual Phase ◽  
Resource Requirement ◽  
Alloy Steels ◽  
Potential Weight

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).

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