Extra work hardening in room-temperature quenching and partitioning medium Mn steel enabled by intercritical annealing

He，B. B.1; Pan，S.1; Huang，M. X.2

2020-10-21

10.1016/j.msea.2020.140106

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   影响因子和分区

0921-5093

1873-4936

The present work applies an intercritical annealing process on a room-temperature quenching and partitioning (RT Q&P) medium Mn steel. It is found that the intercritical annealing maintains the amount of austenite while improves its mechanical stability. The reverse transformation during the intercritical annealing competes with the martensitic transformation during the quenching, resulting in a similar quantity of austenite after the intercritical annealing. Both reverse transformation and martensitic transformation help to refine the austenite grain size and facilitate C enrichment, enhancing the austenite stability. The intercritical annealing improves both ultimate tensile strength and uniform elongation of RT Q&P medium Mn steel, which is ascribed to an extra work hardening resulted from the improved austenite stability.

Intercritical annealing Medium Mn steel Room-temperature quenching and partitioning TRIP effect Work hardening

SCI ; EI

英语

第一 ; 通讯

Southern University of Science and Technology[33/Y01336122] ; National Key Research and Development Program of China[2019YFA0209900] ; National Natural Science Foundation of China[U1764252] ; Research Grants Council of Hong Kong[17255016][17210418][R7066-18]

Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000579487100036

ELSEVIER SCIENCE SA

20203409092730

Martensitic transformations ; Transformation Induced Plasticity steel ; Annealing ; Austenite ; Strain hardening ; Tensile strength ; Manganese steel ; Quenching ; Mechanical stability

Metallography:531.2 ; Heat Treatment Processes:537.1 ; Steel:545.3 ; Thermodynamics:641.1

MATERIALS SCIENCE

2-s2.0-85089653453

Scopus

1.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Department of Mechanical Engineering,The University of Hong Kong,Hong Kong,China

He，B. B.,Pan，S.,Huang，M. X.. Extra work hardening in room-temperature quenching and partitioning medium Mn steel enabled by intercritical annealing[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,797.

He，B. B.,Pan，S.,&Huang，M. X..(2020).Extra work hardening in room-temperature quenching and partitioning medium Mn steel enabled by intercritical annealing.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,797.

He，B. B.,et al."Extra work hardening in room-temperature quenching and partitioning medium Mn steel enabled by intercritical annealing".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 797(2020).