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Influence of High-Temperature Compression on Microstructure and Properties of Sintered Molybdenum

  • Fu Wang
  • Zenglin ZhouEmail author
  • Yan Li
  • Zhilin Hui
  • Xueliang He
  • Xiaoying Fu
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 217)

Abstract

The high-temperature compression of sintered molybdenum was performed at 1200 °C and strain rate of 0.1 s−1 on Gleeble 3500 system, and the deformation amount reached to 50%. The density, Vickers hardness, microstructure, and texture of sintered and compressed molybdenum specimens have been measured and evaluated by Archimedes method, Vickers hardness tester, optical microscopy (OM), and X-ray diffraction (XRD), respectively. The results show that the relative density of Mo specimen increases from 95.9 to 99.4% after high-temperature compression, which is close to fully dense. The Vickers hardness HV10/10 significantly is raised from 174.5 ± 6.8 MPa to 224.1 ± 21.0 MPa. The percentage of hardness fluctuation increases from 7.8 to 18.7%, which indicates that the uniformity of hardness distribution is decreased, and the hardness distribution shows a certain regularity. Combined with optical microstructure, it can be found that there are hard-deforming zone (zone I), free-deforming zone (zone III), and easy-deforming zone (zone II) in the compressed specimen. The texture analysis shows that there is a certain intensity of 〈113〉//ND fiber texture in the sintered Mo specimen, while there are multiplex textures in the compressed one, including the {112}〈111〉, {001}〈100〉, {001}〈110〉, and the residual {113}〈111〉 sintering texture.

Keywords

Sintered molybdenum High-temperature compression Vickers hardness Microstructure Texture 

Notes

Acknowledgements

This work was supported by the National Key Research and Development Program of China (Grant No. 2017YFB0306000).

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Fu Wang
    • 1
  • Zenglin Zhou
    • 1
    Email author
  • Yan Li
    • 1
  • Zhilin Hui
    • 1
  • Xueliang He
    • 1
  • Xiaoying Fu
    • 1
  1. 1.Powder Metallurgy and Special Materials Research DepartmentGRIMAT Engineering Institute Co., LtdBeijingChina

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