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Effects of deformation temperature on the mechanical properties and microstructure of lean duplex stainless steels B2102 and $32101 have been investigated.It was found that the strength decreased continuously with increases in temperature from-60 ℃ to 100 ℃.The strength of $32101 was higher than that of B2102 owing to its higher nitrogen content.Plasticity of B2102 increased with an increase in deformation temperature from-60 ℃ and reached the optimal elongation ratio of 49%-54% after deformation at 20-50 ℃.Martensite transformation was observed during deformation due to the transformation-induced plasticity effect.The optimal elongation was achieved at deformation temperatures close to the M_d(30/50) temperatures of 62℃ and 6℃ for B2102 and S32101,respectively.
Effects of deformation temperature on the mechanical properties and microstructure of lean duplex stainless steels B2102 and $ 32101 have been investigated. It was found the strength decreasing continuously with increases in temperature from -60 ° C to 100 ° C. Strength of $ 32101 was higher than that of B2102 owing to its higher nitrogen content. Plasticity of B2102 increased with an increase in deformation temperature from -60 ° C and reached the optimal elongation ratio of 49% -54% after deformation at 20-50 ° C. to the transformation-induced plasticity effect. The optimal elongation was achieved at deformation temperatures close to the M_d (30/50) temperatures of 62 ° C and 6 ° C for B2102 and S32101, respectively.