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Mechanical Characteristics of Steel01:18

Mechanical Characteristics of Steel

801
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...
801

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Correction: Yang et al. Microstructural Characteristics of High-Pressure Die Casting with High Strength-Ductility Synergy Properties: A Review. <i>Materials</i> 2023, <i>16</i>, 1954.

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Generation of Scalable, Metallic High-Aspect Ratio Nanocomposites in a Biological Liquid Medium
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Microstructural Features in Multicore Cu-Nb Composites.

Elena N Popova1, Irina L Deryagina1, Evgeniya G Valova-Zaharevskaya1

  • 1M.N. Miheev Institute of Metal Physics Ural Branch of RAS, 620108 Ekaterinburg, Russia.

Materials (Basel, Switzerland)
|November 27, 2021
PubMed
Summary
This summary is machine-generated.

Heavily drawn copper-niobium composites exhibit enhanced fiber texture with increasing strain. Annealing causes niobium filament coagulation and lattice distortion vanishing, reducing strength at high temperatures.

Keywords:
electron microscopymicrohardnessmicrostructuremultifilamentary Cu–Nb compositesthermal stability

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Area of Science:

  • Materials Science
  • Metallurgy
  • Physical Metallurgy

Background:

  • Multicore Cu-Nb composites are advanced materials with unique properties.
  • The melt-and-deform method is crucial for fabricating these composites.
  • Understanding their microstructure and thermal stability is key for applications.

Purpose of the Study:

  • To investigate the microstructure, microhardness, and thermal stability of heavily drawn Cu-18Nb composites.
  • To analyze the effects of drawing and annealing on the material's structure and properties.

Main Methods:

  • Melt-and-deform fabrication of Cu-18Nb composites.
  • Cold drawing and rolling to achieve desired shapes and strains.
  • Microstructural analysis using SEM, TEM, and X-ray diffraction.
  • Microhardness measurements and thermal stability testing.

Main Results:

  • Sharpening of the fiber texture (110Nb∥111Cu∥DD) with increased strain.
  • Observation of niobium lattice distortions (broadening in longitudinal, compaction in transverse directions).
  • Copper matrix lattice distortion observed, less pronounced due to recrystallization.
  • Annealing leads to Nb filament coagulation and vanishing lattice distortions.
  • Structural changes initiate at 300-400 °C, intensify at 600 °C, and reduce strength at 700-800 °C.

Conclusions:

  • The study elucidates the microstructural evolution and thermal behavior of drawn Cu-18Nb composites.
  • Lattice distortions and filament morphology are significantly influenced by strain and annealing.
  • The findings provide insights into the mechanical and thermal limits of these materials.