Materials Reports  2019, Vol. 33 Issue (z1): 369-372 |
| METALS AND METAL MATRIX COMPOSITES |
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| Effect of Aging Treatment at 850 ℃ on Microstructures and Mechanical Properties in Duplex Stainless Steel 2205 |
| CHAO Daiyi1, XU Rengen2, SUN Youzheng1, ZHAO Wei1, LYU Zhengfeng1, CHENG Rence1, SHAO Wenzhu3
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1 Shandong Nanshan Aluminum Co., Ltd., Longkou 265713
2 School of Environmental and Materials Engineering, Yantai University, Yantai 264005
3 School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150006 |
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Abstract The influence of aging treatment at 850 ℃ on microstructure and properties in duplex stainless steel 2205 was studied and the fracture morphology as analyzed. The results showed that the σ-phase was first appeared at δ/γ phase boundary and δ-phase after 850 ℃ aging treatment. The σ-phase continuously grew up into the direction of the ferrite and the volume fraction was increasing with aging time. The linear was existed between tensile strength, elongation, impact toughness and the volume fraction of σ-phase. In the early aging time, the dimples were found on the fracture surface, and then grew into the local cleavage with dimples areas after aging 60 min, until to aging for 240 min the fracture surface was almost cleavage fracture. The results indicated that the toughness of the material is reduced significantly.
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Published: 05 July 2019
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| About author:: Daiyi Chao received his master of engineering in environmental and material engineering from Yantai University in June 2013. Doing scientific research in Harbin Institute technology from March 2011 to April 2013. His research has focused on heat treatment process of stainless steel and aluminum alloy. He has published 3 journal papers as the first author and participated in published 4 core journals and 1 SCI article. He is currently working in the Research institute of Shandong Nanshan Aluminum Co., Ltd, and mainly engaged in heat treatment and deformation process of stainless steel and high strength aluminum alloy. |
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