High-temperature internal oxidation behavior of surface cracks in low alloy steel bloom

AbstractSmall punch (SP) tests on single grained titanium aluminide (Ti-48 at.%Al) specimens with 12° and 80° lamellar orientations with respect to the tensile stress axis were conducted at 1123 K in air. Brittle cracks readily extended through the thickness in the 80° lamellar structure. In a SP specimen with the 12° lamellar structure load-interrupted at the strain of 0.43%, surface cracks with the depth of 15–25 μm were formed along lamellar boundaries. Local oxidation behavior on partly sputtered surfaces in the load-interrupted 12° lamellar specimen was examined using scanning Auger microprobe (SAM). Oxygen enriched regions were observed near cracks and some lamellar layers. The mechanisms of high temperature oxygen-induced cracking are discussed in terms of the local oxidation near cracks and lamellar boundaries.

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Optimal degree of deformation of austenite in high-temperature thermomechanical treatment (HTTMT) of low-alloy steel

Metal Science and Heat Treatment ◽

10.1007/bf00652742 ◽

1970 ◽

Vol 12 (9) ◽

pp. 790-792 ◽

Cited By ~ 1

Author(s):

M. V. Pridantsev ◽

E. I. Ivantsova

Keyword(s):

High Temperature ◽

Alloy Steel ◽

Thermomechanical Treatment ◽

Low Alloy Steel ◽

Degree Of Deformation ◽

Optimal Degree

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Research of Recrystallization Processes in Low-Carbon Low-Alloy Steel in Modeling High-Temperature Rolling

Inorganic Materials Applied Research ◽

10.1134/s2075113319060121 ◽

2019 ◽

Vol 10 (6) ◽

pp. 1301-1308 ◽

Cited By ~ 1

Author(s):

S. V. Korotovskaya ◽

O. V. Sych ◽

E. I. Khlusova ◽

E. A. Yashina

Keyword(s):

High Temperature ◽

Alloy Steel ◽

Low Carbon ◽

Low Alloy Steel

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Study on High Temperature Flow Stress Model of As-cast SA508-3 Low Alloy Steel

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.831.25 ◽

2020 ◽

Vol 831 ◽

pp. 25-31

Author(s):

Pan Fei Fan ◽

Jian Sheng Liu ◽

Hong Ping An ◽

Li Li Liu

Keyword(s):

High Temperature ◽

Flow Stress ◽

Strain Rate ◽

Alloy Steel ◽

Flow Behavior ◽

Peak Stress ◽

Stress Model ◽

Low Alloy Steel ◽

Two Stage ◽

Flow Stress Model

In order to obtain the high temperature flow behavior of as-cast SA508-3 low alloy steel, the stress-strain curves of steel are obtained by Gleeble thermal simulation compression test at deformation temperature 800°C-1200°C and strain rate 0.001s-1-1s-1. Based on Laasraoui two-stage flow stress model, a high temperature flow stress model is established by multiple linear regression method. The results show that the peak stress characteristics are not obvious at low temperature and high strain rate, which is a typical dynamic recovery characteristic. Meanwhile, the peak stress characteristics are obvious at high temperature and low strain rate, which is a typical dynamic recrystallization characteristic. By means of the comparisons between experiments and calculations, the Laasraoui two-stage flow stress model can truly reflect flow behavior of steel at high temperature, which provides theoretical guidance for the hot deformation of the steel.

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