Tendency of low-alloy steel toward brittle fracture during tensile tests

1970 ◽  
Vol 2 (8) ◽  
pp. 804-808
Author(s):  
V. P. Kharchevnikov ◽  
B. M. Ovsyannikov
Keyword(s):  
Brittle Fracture ◽  
Alloy Steel ◽  
Tensile Tests ◽  
Low Alloy Steel

Effect of thermomechanical treatment on the resistance of low-carbon low-alloy steel to brittle fracture

2015 ◽  
Vol 116 (2) ◽  
pp. 189-199 ◽  
Author(s):  
V. M. Schastlivtsev ◽  
T. I. Tabatchikova ◽  
I. L. Yakovleva ◽  
S. Yu. Del’gado Reina ◽  
S. A. Golosienko ◽  
...  
Keyword(s):  
Brittle Fracture ◽  
Alloy Steel ◽  
Thermomechanical Treatment ◽  
Low Carbon ◽  
Low Alloy Steel

A Study of High Temperature Damage Processes Using Microradiography

1988 ◽  
Vol 142 ◽  
Author(s):  
J. E. Benci ◽  
D. P. Pope
Keyword(s):  
Image Analysis ◽  
Alloy Steel ◽  
Hydrostatic Stress ◽  
Equivalent Stress ◽  
Creep Damage ◽  
Tensile Tests ◽  
Crack Plane ◽  
Image Analysis System ◽  
Low Alloy Steel ◽  
Damage Process

AbstractSynchrotron radiation and microradiographic techniques were used to study the development of creep damage in notched tensile samples. The creep damage in these samples was recorded using microradiography. The density and distribution of creep damage was measured from the microradiographs using an image analysis system. The results from the image analysis can be compared to damage predictions from finite element models of the damage process to determine the quality of these models.Notched tensile samples of copper, iron and a low alloy steel were subjected to slow strain rate tensile tests at 500°C or 700°C. The tests were interrupted after various fractions of the creep lives had been expended. 1 mm thick longitudinal sections were then removed from the center of each sample for microradiography using electro-discharge machining.Creep damage in the copper alloy was concentrated in a fairly narrow band around the plane of minimum cross-section in the samples. This is in stark contrast to the results from iron and the low alloy steel. The creep damage in these materials developed at fairly sharp angles to the notch or crack plane. These results show that the damage process in iron and this steel is controlled by the equivalent stress while the formation of damage in copper is controlled by the maximum principal or hydrostatic stress.

Susceptibility to brittle fracture of low-alloy steel 18Gps

1972 ◽  
Vol 14 (3) ◽  
pp. 190-194
Author(s):  
I. M. Barynina ◽  
V. S. Yakovleva ◽  
S. V. Bernshtein
Keyword(s):  
Brittle Fracture ◽  
Alloy Steel ◽  
Low Alloy Steel

scholarly journals Effect of Thermal Cycle on Microstructure Evolution and Mechanical Properties of Selective Laser Melted Low-Alloy Steel

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3625
Author(s):  
Xueliang Kang ◽  
Shiyun Dong ◽  
Hongbin Wang ◽  
Shixing Yan ◽  
Xiaoting Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Brittle Fracture ◽  
Alloy Steel ◽  
Lower Bainite ◽  
Granular Bainite ◽  
Low Alloy Steel ◽  
Traditional Methods ◽  
Average Grain Size ◽  
Solidification Microstructures

Low-alloy steel samples were successfully fabricated by selective laser melting (SLM). The evolution of the microstructure and the mechanical properties were investigated with different values of the energy area density (EAD). The results revealed that the initial solidification microstructures of the single tracks with different EADs were all martensite. However, the microstructures of bulk samples under different EADs were not martensite and differed significantly even from one another. When EAD increased from 47 to 142 J/mm2, the mixed lower bainite and martensite austenite microstructure changed to granular bainite; further, the morphology of bainite ferrite gradually changed from lath to multilateral. Moreover, with the increase of EAD, the grain size was remarkably reduced because of the increasing austenitizing periods and temperature during thermal cycling. The average grain size was 1.56 µm, 3.98 µm, and 6.31 µm with EADs of 142 J/mm2, 71 J/mm2, and 47 J/mm2, respectively. Yield strength and tensile strength of the SLM low-alloy steel increased with the increase in EAD; these values were significantly more than those of the alloys prepared by traditional methods. The microstructure of the SLM low-alloy steel samples is not uniform, and the inhomogeneity becomes more significant as EAD decreases. Simultaneously, when EAD decreases, the fracture mechanism changes from ductile to a mixture of ductile and brittle fracture; this is in contrast to the samples prepared by traditional methods. This study also found a stress concentration mechanism around large pores during plastic deformation that resulted in a brittle fracture. This indicates that large-sized pores significantly degrade the mechanical properties of the specimens.

scholarly journals Brittle fracture analysis of Dissimilar Metal Welds between low-alloy steel and stainless steel at low temperatures

2018 ◽  
Vol 13 ◽  
pp. 619-624
Author(s):  
Ghassen Ben Salem ◽  
Stéphane Chapuliot ◽  
Arnaud Blouin ◽  
Philippe Bompard ◽  
Clémentine Jacquemoud
Keyword(s):  
Stainless Steel ◽  
Brittle Fracture ◽  
Alloy Steel ◽  
Low Temperatures ◽  
Fracture Analysis ◽  
Low Alloy Steel ◽  
Dissimilar Metal
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