Scholarlink

<p>The effects of Mn content on the microstructure and properties of 20Cr lean duplex stainless steel were studied by means of scanning electron microscope, x-ray diffractometer and electron backscatter diffraction. The results show that the increase of Mn content can promote the formation of austenite phase. When the Mn content increases from 3 to 9 wt.%, the volume fraction of austenite phase increases from 50.9 to 55.2%. During the deformation process, the ferrite phase mainly undergoes coordinated deformation, and the deformation strengthening mainly comes from the austenitic phase. The addition of Mn can change the stacking fault energy (SFE) of austenite phase, thereby affecting the deformation mechanism of experimental steel. When the Mn content is 3 wt.%, the SFE of austenite phase is 19.15&#xa0;mJ/m<sup>2</sup>, and the deformation is mainly controlled by deformation-induced martensitic transformation. When the Mn content increases to 6 wt.%, due to the improved stability of austenite in the steel (SFE = 19.73&#xa0;mJ/m<sup>2</sup>), deformation is induced by the synergistic effect of deformation-induced martensitic transformation and twinning mechanisms. With the addition of Mn reaching 9 wt.%, the SFE of austenite phase increased to 20.87&#xa0;mJ/m<sup>2</sup>. Under this condition, the deformation mechanism was mainly twinning.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of Mn Content on Microstructure and Properties of 20Cr Lean Duplex Stainless Steel

  • 期刊论文

  • 发表日期：

    2025年5月29日

查看全文
  • Kai Chen,
  • Mingkun Jiang,
  • Weiwei Zhu,
  • Guoqing Zu,
  • Jingshi Zhang,
  • Ying Han,
  • Xu Ran

摘要

The effects of Mn content on the microstructure and properties of 20Cr lean duplex stainless steel were studied by means of scanning electron microscope, x-ray diffractometer and electron backscatter diffraction. The results show that the increase of Mn content can promote the formation of austenite phase. When the Mn content increases from 3 to 9 wt.%, the volume fraction of austenite phase increases from 50.9 to 55.2%. During the deformation process, the ferrite phase mainly undergoes coordinated deformation, and the deformation strengthening mainly comes from the austenitic phase. The addition of Mn can change the stacking fault energy (SFE) of austenite phase, thereby affecting the deformation mechanism of experimental steel. When the Mn content is 3 wt.%, the SFE of austenite phase is 19.15 mJ/m2, and the deformation is mainly controlled by deformation-induced martensitic transformation. When the Mn content increases to 6 wt.%, due to the improved stability of austenite in the steel (SFE = 19.73 mJ/m2), deformation is induced by the synergistic effect of deformation-induced martensitic transformation and twinning mechanisms. With the addition of Mn reaching 9 wt.%, the SFE of austenite phase increased to 20.87 mJ/m2. Under this condition, the deformation mechanism was mainly twinning.