Influence of Heat Treatment Condition on Tensile Properties of AM350 Stainless Steel

• Published in: Transactions of the Indian Institute of Metals Vol. 76; no. 1; pp. 87 - 95
• Main Authors: Kumar Krovvidi, S. C. S. P., Das, C. R., Goyal, Sunil, Arun Kumar, S., Mahadevan, S., Albert, Shaju K., Raghupathy, S.
• Format: Journal Article
• Language: English
• Published: New Delhi Springer India 2023; Springer Nature B.V
• Subjects: Bellows; Chemistry and Materials Science; Corrosion and Coatings; Heat treatment; Martensite; Materials Science; Materials selection; Metallic Materials; Original Article; Room temperature; Stainless steels; Tensile deformation; Tensile properties; Tribology; X-ray diffraction; temperature; Tensile testing; AM350; Strain-induced martensitic transformation
• ISSN: 0972-2815; 0975-1645
• DOI: 10.1007/s12666-022-02726-y

AM350 is a candidate material for welded disc bellows in nuclear applications. The assessment of tensile deformation behavior of AM350 stainless steel in two different heat treatment conditions, solution annealed (SA) and sub-cooling and tempered (SCT), has been carried out in this investigation. Microstructure in the former heat treatment condition was predominantly austenitic while in the latter, it was martensitic. The material in SCT condition was found to have higher yield and tensile strengths and lower ductility at room temperature and 530 °C than in the SA condition. During tensile deformation, it was found that the material exhibited strain-induced martensite, which was estimated by volume fraction in XRD and ferritescope measurements. However, at 530 °C, the same was absent as the testing temperature was more than
M
d
temperature. The results of the work are useful in understanding the response of AM350 during manufacturing and in service.