scholarly journals Fractographic Analysis of Mechanical Properties of Microalloyed Steel

2021 ◽  
Vol 2070 (1) ◽  
pp. 012174
Author(s):  
N B Garg ◽  
A Garg
Keyword(s):  
Mechanical Properties ◽  
Impact Energy ◽  
Thermomechanical Processing ◽  
Microalloyed Steel ◽  
High Strength ◽  
Low Alloy Steels ◽  
The Past ◽  
Alloy Steels ◽  
Quenching And Tempering ◽  
Subsequent Quenching

Abstract Extensive efforts made over the past few decades have enhanced the rising performance of High-Strength Low-Alloy steels. Use of thermomechanical processing was considered for this research. However, the desired mechanical properties are obtained by formulating alloys. Further, to enhance mechanical properties, impact energy, the subsequent quenching and tempering are used. The metallurgical transformation caused by deformation followed by cooling and/or heat treatment has added influences on steels’ mechanical properties. The rational decrease in impact energy value is complex.

scholarly journals Mechanical properties of ausforged 27MnSiVS6 microalloyed steel

2013 ◽  
Vol 66 (3) ◽  
pp. 331-338
Author(s):  
Celio Caminaga ◽  
Sergio Tonini Button
Keyword(s):  
Mechanical Properties ◽  
Microalloyed Steel ◽  
Hot Forging ◽  
High Strength ◽  
Microalloyed Steels ◽  
Low Alloy Steels ◽  
Tensile Fatigue ◽  
Alloy Steels ◽  
Quality Of Products ◽  
Warm Forging

Hot forging of microalloyed steels, also known as high strength low alloy steels (HSLA), has a wide application for manufacturing automotive components. The purpose of this study was to evaluate the microstructure and the mechanical strength and toughness of the 27MnSiVS6 microalloyed steel, when formed by ausforging, to analyze the process performance and the quality of products. Ausforging was compared to both hot and warm forging processes. As a result, considering the tensile, fatigue (under rotating bending) and the fracture toughness tests, the best mechanical properties were shown by the ausforged products. Statistical analyses revealed that products obtained by ausforging presented the best combination of strength and surface quality, without increasing the forging load.

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).

Hydrogen Compatibility and Suitability of (Ni)-Cr-Mo High-Strength Low-Alloy Seamless Line Pipe Steels for Pressure Vessels for Hydrogen Storage

2018 ◽  
Author(s):  
Akihide Nagao ◽  
Nobuyuki Ishikawa ◽  
Toshio Takano
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
High Strength ◽  
Pressure Vessels ◽  
Hydrogen Gas ◽  
Low Alloy Steels ◽  
Pipe Steels ◽  
Line Pipe ◽  
Alloy Steels ◽  
Pressure Hydrogen

Cr-Mo and Ni-Cr-Mo high-strength low-alloy steels are candidate materials for the storage of high-pressure hydrogen gas. Forging materials of these steels have been used for such an environment, while there has been a strong demand for a higher performance material with high resistance to hydrogen embrittlement at lower cost. Thus, mechanical properties of Cr-Mo and Ni-Cr-Mo steels made of quenched and tempered seamless pipes in high-pressure hydrogen gas up to 105 MPa were examined in this study. The mechanical properties were deteriorated in the presence of hydrogen that appeared in reduction in local elongation, decrease in fracture toughness and accelerated fatigue-crack growth rate, although the presence of hydrogen did not affect yield and ultimate tensile strengths and made little difference to the fatigue endurance limit. It is proposed that pressure vessels for the storage of gaseous hydrogen made of these seamless line pipe steels can be designed.

Effect of Different Heat Treatments on Microstructure and Mechanical Properties of the Martensitic Gx12CrMoVNbN9-1 Cast Steel / Wpływ Parametrów Obróbki Cieplnej Na Mikrostrukture I Własciwosci Mechaniczne Martenzytycznego Staliwa Gx12CrMoVNbn9-1

2013 ◽  
Vol 58 (1) ◽  
pp. 25-30 ◽  
Author(s):  
G. Golanski ◽  
J. Słania
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Impact Energy ◽  
Cast Steel ◽  
Lath Martensite ◽  
High Strength ◽  
Strength Properties ◽  
Microstructure And Mechanical Properties ◽  
Quenching And Tempering ◽  
Very High

The paper presents a research on the influence of multistage heat treatment with the assumed parameters of temperature and time on the microstructure and mechanical properties of high-chromium martensitic GX12CrMoVNbN9-1 (GP91) cast steel. In the as-cast state GP91 cast steel was characterized by a microstructure of lath martensite with numerous precipitations of carbides of the M23C6, M3C and NbC type, with its properties higher than the required minimum. Hardening of the examined cast steel contributes to obtaining a microstructure of partly auto-tempered martensite of very high strength properties and impact strength KV on the level of 9-15 J. Quenching and tempering with subsequent stress relief annealing of GP91 cast steel contributed to obtaining the microstructure of high-tempered lath martensite with numerous precipitations of the M23C6 and MX type of diverse size. The microstructure of GP91 cast steel received after heat treatment was characterized by strength properties (yield strength, tensile strength) higher than the required minimum and a very high impact energy KV. It has been proved that GP91 cast steel subject to heat treatment No. 2 as a result of two-time heating above the Ac3 temperature is characterized by the highest impact energy.

Effect of Microadditives on Center Segregation and Mechanical Properties of High-Strength Low-Alloy Steels

Metallurgist ◽  
2016 ◽  
Vol 60 (7-8) ◽  
pp. 888-895 ◽  
Author(s):  
Chengyang Hu ◽  
Kaiming Wu ◽  
A. Trotsan ◽  
Yu Li ◽  
O. Isayev ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Strength ◽  
Low Alloy Steels ◽  
Alloy Steels

STUDY OF HIGH-STRENGTH LOW-ALLOY STEEL WITH SUPER-EQUILIBRIUM NITROGEN CONTENT

2020 ◽  
pp. 3-13
Author(s):  
S.A. Krylov ◽  
◽  
A.A. Makarov ◽  
M.A. Druzhnov ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Nitrogen Content ◽  
Mechanical Characteristics ◽  
High Strength ◽  
Low Alloy Steels ◽  
Low Alloy Steel ◽  
Joint Work ◽  
Alloy Steels ◽  
High Level

In continuation of joint work of FSUE «VIAM» and IMET RAN named after Baikov, in the field of obtaining low-alloy steels with increased mechanical properties with a super-equilibrium nitrogen content, the mechanical properties, structure, and chemical composition of the obtained steel were studied. It is shown that steel 10KH3A with a super-equilibrium nitrogen content (up to 0,2) electroslag remelting under pressure DESHP-0,1 (FSUE «VIAM») provides a high level of properties (ultimate strength 1670 MPa) while maintaining high mechanical characteristics (elongation 10%, constriction 50%).

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