Achieving strength-ductility synergy in AISI 904L superaustenitic alloy through severe plastic deformation and post-deformation annealing

被引：0
|
作者：
Roostaei, Milad [1 ]
Sohrabi, Mohammad Javad [2 ]
Wurster, Stefan [1 ]
Renk, Oliver [3 ]
Kalhor, Alireza [4 ]
Mobasheri, Mohammad [2 ,5 ]
Mirzadeh, Hamed [2 ]
Spieckermann, Florian [6 ]
Rodak, Kinga [4 ]
Mahmudi, Reza [2 ]
Pippan, Reinhard [1 ]
机构：
[1] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria
[2] Univ Tehran, Coll Engn, Sch Met & Mat Engn, POB 14395-515, Tehran, Iran
[3] Univ Leoben, Dept Mat Sci, Roseggerstr 12, A-8700 Leoben, Austria
[4] Silesian Tech Univ, Fac Mat Engn, Krasinskiego 8, PL-40019 Katowice, Poland
[5] Ecole Polytech Fed Lausanne, Lab Construct Mat, Lausanne, Switzerland
[6] Univ Leoben, Chair Mat Phys, Dept Mat Sci, Franz Josef Str 18, A-8700 Leoben, Austria
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2025年 / 935卷
关键词：
Superaustenitic stainless steel; Severe plastic deformation; High-pressure torsion; Mechanical properties; Nanostructured material; HIGH-PRESSURE TORSION; HALL-PETCH RELATIONSHIP; MECHANICAL-PROPERTIES; THERMAL-STABILITY; EVOLUTION; BEHAVIOR; HPT; MICROSTRUCTURE; TEMPERATURE; SHAPE;
D O I：
10.1016/j.msea.2025.148382
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The evolution of microstructure and mechanical properties of AISI 904L stainless steel subjected to high-pressure torsion (HPT) and post-deformation annealing was investigated. A nanocrystalline microstructure with an average grain size of 48 nm was obtained by HPT, showing an ultra-high strength of similar to 2.2 GPa. However, a rather limited ductility in the tension experiment was observed, and necking started immediately after the elastic regime. Post-deformation annealing resulted in recrystallization, formation of sigma-phase, and grain growth, where the best strength-ductility synergy (high strength of similar to 1.5 GPa and total elongation of 24%) was obtained for the samples continuously annealed from room temperature up to 790 degrees C with an ultrafine-grained (UFG) microstructure (average grain size of 220 nm) and low amounts of the sigma-phase.
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页数：7
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