Phase transformation, Mechanical Properties and Corrosion Behavior of 304L Austenitic Stainless Steel Rolled at Room and Cryo Temperatures

Defence science journal

article

Rahul Singh¹  Surya Deo Yadav²  Biraj Kumar Sahoo³  Sandip Ghosh Chowdhury³  Abhishek Kumar¹ 

[1] Department of Applied Mechanics, Motilal Nehru National Institute of Technology Allahabad;Department of Metallurgical Engineering, Indian Institute of Technology (BHU) Varanasi - India;Material Engineering Division, CSIR-National Metallurgical Laboratory

关键词: Cryorolling;    Room temperature rolling;    304L austenitic stainless steel;    Phase transformation;    Mechanical properties;    Corrosion behaviour;   

DOI  :  10.14429/dsj.71.16721

学科分类：社会科学、人文和艺术（综合）

来源: Defence Scientific Information & Documentation Centre

【 摘 要 】

The present work investigates the effect of rolling (90% thickness reduction) on phase transformation, mechanical properties, and corrosion behaviour of 304L-austenitic stainless steel through cryorolling and room temperature rolling. The processed steel sheets were characterised through X-ray diffraction (XRD), electron backscattered diffraction (EBSD), and vibrating sample magnetometer (VSM). The analysis of XRD patterns, EBSD scan, and vibrating sample magnetometer results confirmed the transformation of the austenitic phase to the martensitic phase during rolling. Cryorolling resulted in improved tensile strength and microhardness of 1808 MPa and 538 VHN, respectively, as compared to 1566 MPa and 504 VHN for room temperature rolling. The enhancement in properties of cryorolled steel is attributed to its higher dislocation density compared to room temperature rolled steel. The corrosion behaviour was assessed via linear polarisation corrosion tests. Corrosion resistance was found to decrease with increasing rolling reduction in both room temperature rolled and cryorolled specimens.

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