Effects of solution treatment on mechanical properties and corrosion resistance of 4A duplex stainless steel
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Panpan Lu
, Aiqin Wang , Jingpei Xie und Wenyan Wang
Abstract
In this study, 4A duplex stainless steels were prepared via remelting in an intermediate frequency furnace and subsequently solution treated at different temperatures. The effects of solution treatment on the mechanical properties and corrosion resistance of 4A duplex stainless steel were investigated. Microstructures were characterized via optical microscopy and scanning electron microscopy. The mechanical properties were evaluated via hardness test, tensile test, and impact test experiments. The point corrosion resistance was studied via chemical immersion and potentiodynamic anodic polarization. The results showed that with increasing solution temperature in the range of 1 223 – 1 423 K, the tensile strength and hardness first decreased and then increased, and minimum values were obtained at 1 323 K. The σ phase precipitated at the boundaries of the α/γ phases in samples solution treated at 1 223 K, decreasing both impact energy and pitting potential of the experimental steels. When experimental steels were solution treated at 1 373 K for 2 h, a suitable volume fraction of α/γ was uniformly distributed throughout the microstructure, and the steels exhibited optimal mechanical properties and pitting corrosion resistance.
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Artikel in diesem Heft
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Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Phase-field simulation of the solidified microstructure in a new commercial 6××× aluminum alloy ingot supported by experimental measurements
- Hydrogen sorption and corrosion properties of La2Ni9CoSn0.2 alloy
- Isothermal sections of the Co–Ni–Ti system at 950 and 1 000 °C
- Experimental and theoretical study of temperature-dependent variable stiffness of magnetorheological elastomers
- Photocatalytic properties of nano-structured carbon nitride: a comparison with bulk graphitic carbon nitride
- Effects of solution treatment on mechanical properties and corrosion resistance of 4A duplex stainless steel
- Three-body abrasive wear behaviour of metastable spheroidal carbide cast irons with different chromium contents
- Intermetallic precipitation in rare earth-treated A413.1 alloy: A metallographic study
- Short Communications
- Microstructure and magnetic properties of iron–cobalt-based alloys processed by metal injection moulding
- Solid-state synthesis and magnetic properties of rhombohedral phase Mg2SiNi3
- DGM News
- DGM News