Effect of cold deformation on microstructure and mechanical properties of 028 alloy containing nitrogen

doi:10.13251/j.issn.0254-6051.2021.12.004

Abstract

Abstract: Effect of cold rolling deformation on microstructure and mechanical properties of 028 alloy containing nitrogen was studied by means of optical microscope (OM), transmission electron microscope (TEM) and tensile test. The results show that when the amount of cold deformation is the same, the yield strength increases obviously with the increase of nitrogen content. When the cold deformation is increased from 0% to 70%, the tensile strength of the 0.25%N tested alloy is increased from 764 MPa to 1405 MPa, and the yield strength is increased from 390 MP to 1249 MPa. At low deformation, there are a large number of dislocations and plane slip structures in the alloy. With the increase of cold deformation, the number of deformation twins in the alloy increases gradually, and the dislocations multiply continuously. When the cold deformation continues to increase, the deformation twins are split and broken.

Key words: nitrogen containing 028 alloy, cold deformation, microstructure, mechanical properties

CLC Number:

TG142.1

Gong Fangyuan, Feng Hanqiu, Lang Yuping, Chen Haitao, Wang Baoshun, Zhong Qiang, Leng Chongyan. Effect of cold deformation on microstructure and mechanical properties of 028 alloy containing nitrogen[J]. Heat Treatment of Metals, 2021, 46(12): 19-23.

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