Hot deformation behaviour of and processing map for an Ni-based austenitic stainless steel
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Rongxia Chai
Abstract
The hot deformation behaviour of an Ni-based austenitic stainless steel (Fe-31Ni-15Cr austenitic steel) was investigated by isothermal tensile testing at temperatures ranging from 900–1100°C and at strain rates of 0.01, 0.1, 1 and 10 s−1. The effects of the deformation parameters were studied through analyses of true stress–strain curves. Processing maps were built based on the dynamic material model. The fracture morphology was observed. The stress of the alloy has a dependence on strain rate and deformation temperature. A modified Johnson–Cook constitutive model was built and examined. The entire tensile fracture surface presenting typical plastic fracture morphology is covered by dimples and voids. The processing maps reveal that instability mainly appears in Ni-based austenitic stainless steel at low deformation temperatures ranging from 900–940°C.
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Articles in the same Issue
- Contents
- Contents
- Original Contributions
- Static recrystallization characteristics and kinetics of high-silicon steels for direct quenching and partitioning
- Kinetics of intermetallic compound layers during initial period of reaction between mild steel and molten aluminum
- Effects of Cr and Zn on the interfacial microstructures of borides in Fe–Cr–B cast steels during hot-dipping in Al–Zn alloys
- Hot deformation behaviour of and processing map for an Ni-based austenitic stainless steel
- Design, microstructural characterization and heat treatment of novel Cu0.5FeNiVAlx high-entropy alloys
- Effects of temperature field and SiC nanoparticles on microstructure and mechanical properties of n-SiCp/Mg-9 %Al composites fabricated by ultrasonication-assisted semi-solid hot pressing of powder
- Investigation of the microstructure and mechanical properties of NbB2 particle reinforced aluminum matrix composites
- Effect of Al2O3/SiO2 ratio on viscosity and structure of CaO–Al2O3–SiO2–CaF2–MgO slag
- Microstructure and oxidation of Ni–Fe2O3 composite coating on AISI 304 stainless steel
- Synthesis and performance of Al3+-doped cathode materials 0.6Li[Li1/3Mn2/3]O2 · 0.4Li[Ni1/3Mn1/3Co(1/3-y)Aly]O2 by high temperature solid-state method
- Growth and photo-electrochemical properties of rutile TiO2 nanowire arrays prepared by the hydrothermal method
- Deposition of fine copper film on samples placed internally and externally to the cathodic cage
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