The influence of the martensite 汐＊ phase occurring in the structure of cold rolled austenitic Cr-Ni steel on its mechanical properties

作者：A Kurc; E Kalinowska Ozgowicz

来源：Archives of Materials Science and Engineering, 2009.

• Metallic alloys
• Austenitic stainless steel
• Plastic deformation
• Induced martensite
• Mechanical properties
• Ductile fracture
• Cold rolling

Purpose: In this paper the mechanical properties and structure of cold rolled austenitic stainless steel X5CrNi18-8 with a draft of 17%-78% were presented.Design/methodology/approach: The main methods used for these researches were the static tensile test, microhardness and metallographic observations by optical microscopy. The tested samples have also been analyzed fractographically. The amount of martensite 汐＊ in the obtained microstructures was investigated with X-ray diffraction patterns. The scope of this study was to achieve the correlations between the mechanical and structural properties of cold rolled stainless steel.Findings: Results showed increasing the mechanical properties (Rm, Rp0.2, HV) and decreasing the plasticity (A) with the increasing degree of draft during cold rolling of investigated austenitic stainless steel.Research limitations/implications: In future examinations there is a need to broadening the methodology about the magnetic properties investigations which in the more precise way permit to define the quantity of the martensite 汐＊ phase in the structure of steelX5CrNi18-10 and describe its morphology.Practical implications: A wide range of practical applications of austenitic X5CrNi18-8 steel sheets is warranted by both their high corrosion resistance and high plastic properties, especially in the supersaturated state.Originality/value: The analytic dependence of the yield point (Rp0.2) of the investigated steel on the draft degree in cold rolling has been confirmed.