Kinetics of Dynamic Recrystallization of 18 Ni Maraging Steels

Ni Li; Fei Zhao; Huan Zhang; Yong Hai Ren

doi:10.4028/www.scientific.net/MSF.850.13

Paper Titles

Preface

X-Ray Powder Diffraction Data and Crystal Refinement of a New Compound AlCrNi₃Pr
p.3

Crystal Structure of Al₂Cu₃Nd Ternary Compound
p.8

Kinetics of Dynamic Recrystallization of 18 Ni Maraging Steels
p.13

Thermodynamic Re-Assessment of the Mn-La Binary System
p.21

Thermodynamic Calculations of the Rare Earth Permanent Magnets: Fe-RE Binary Systems
p.27

Compression Deformation Flow Stress Behavior and Prediction of Pure Copper
p.33

Fracture Toughness Analysis of the China RPV Steel with Miniaturized Specimen
p.41

Plastic Deformation and Recrystallization of a Ni-Based Single Crystal Superalloy
p.47

HomeMaterials Science ForumMaterials Science Forum Vol. 850Kinetics of Dynamic Recrystallization of 18 Ni...

Kinetics of Dynamic Recrystallization of 18 Ni Maraging Steels

Abstract:

The dynamic recrystallization behavior of 18 Ni maraging steels was investigated by hot compression tests at temperatures ranging from 900 °C to 1100 °C and strain rates ranging from 0.001 to 1 s^-1. Based on the flow curves from the tests, the effects of temperatures and strain rates on the dynamic recrystallization behavior were analyzed. The strain-hardening rates versus stress curves were used to determine to the critical strain, the peak stress (strain), the saturated stress and the steady stress. With the assistance of the process parameters, constitutive equations were obtained and the activation energy was determined to be 413544.96 J/mol. The dependence of the characteristic values on Zener-Hollomon was found. The dynamic recrystallization kinetics model of the tested steels was constructed and the validity was confirmed based on the experimental results.

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Periodical:

Materials Science Forum (Volume 850)

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13-20

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https://doi.org/10.4028/www.scientific.net/MSF.850.13

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Online since:

March 2016

Authors:

Ni Li, Fei Zhao, Huan Zhang, Yong Hai Ren

Keywords:

18 Ni Maraging Steels, Dynamic Recrystallization, Flow Stress, Recrystallization Kinetics Model

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