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Related Concept Videos

Temperature Dependent Deformation01:12

Temperature Dependent Deformation

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In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
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Steel Manufacturing01:26

Steel Manufacturing

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Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
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Mechanical Characteristics of Steel01:18

Mechanical Characteristics of Steel

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The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
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Steel Fastening Techniques01:17

Steel Fastening Techniques

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Steel sections can be joined together through various fastening techniques including riveting, bolting, and welding, each suitable for different structural requirements and conditions.
Rivets are cylindrical steel fasteners with a specially designed head. During application, rivets are heated until white-hot and then inserted through pre-drilled holes in the steel sections. A pneumatic hammer is used to shape the exposed end into a second head, securing the sections together.
Bolting is another...
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Structural Steel Products01:24

Structural Steel Products

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Structural steel products are created within a structural mill. The process begins with a beam blank that is reheated and then fed through a series of rollers. These rollers progressively shape the metal into its final form. Adjusting the spacings between the rollers allows for the production of different sections with the same nominal dimensions.
Once shaped, the steel's final form emerges as a continuous length, which is then segmented by a hot saw into manageable pieces. These segments...
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Design of Prismatic Beams for Bending01:23

Design of Prismatic Beams for Bending

217
The design of prismatic beams, structural elements with a uniform cross-section, focuses on ensuring safety and structural integrity under load. The design process begins by determining the allowable stress, either from material properties tables, or by dividing the material's ultimate strength by a safety factor. This safety factor is essential for accommodating uncertainties, and varies depending on the material—timber, steel, or concrete—with each having unique strength and...
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Updated: Jun 11, 2025

Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes
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Making large-size fail-safe steel by deformation-assisted tempering process.

Kuanyuan Fan1,2, Baoxi Liu3, Tianlong Liu2

  • 1Research Institute for Energy Equipment Materials, Tianjin Key Laboratory of Materials Laminating Fabrication and Interfacial Controlling Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300132, China.

Scientific Reports
|September 27, 2024
PubMed
Summary

A new deformation-assisted tempering (DAT) process enhances large-scale steel components. This method improves both strength and toughness, offering a novel strategy for fail-safe metallic materials.

Keywords:
Fail-safeFracture toughnessLow-alloy steelMechanical propertiesWarm deformation

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Area of Science:

  • Physical metallurgy
  • Materials science
  • Mechanical engineering

Background:

  • Improving strength and toughness in metallic materials is crucial.
  • Limited research exists on strengthening and toughening large metal components.
  • Large-size components are vital in modern industries.

Purpose of the Study:

  • To propose and evaluate a deformation-assisted tempering (DAT) process.
  • To create a novel microstructure in large-size low-alloyed steel.
  • To enhance the strength-toughness combination in industrial steel components.

Main Methods:

  • Development of a deformation-assisted tempering (DAT) process.
  • Application of DAT to a 1.4-ton low-alloyed plain steel.
  • Microstructural analysis and mechanical property testing.

Main Results:

  • DAT treatment resulted in low dislocation density with high-angle subgrain boundaries and dispersed nano carbides.
  • The treated steel exhibited superior tensile strength and fracture toughness compared to small-size quenched and tempered steels.
  • Significant improvement in low-temperature impact toughness was observed, attributed to delamination and plastic deformation.

Conclusions:

  • The DAT process offers a new strategy for developing large-size, fail-safe steel.
  • This method achieves an excellent combination of strength and fracture resistance.
  • The novel microstructure created by DAT is key to enhanced mechanical properties.