Journal Article

PUBDB-2022-00633

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Tempering and Intercritical Annealing of Air‐Hardening 4 wt% Medium Manganese Steels

Gramlich, A. (Corresponding author) ; Bleck, W.Extern*

2021
Wiley-VCH-Verl. Weinheim

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Please use a persistent id in citations: doi:10.1002/srin.202100180  doi:10.3204/PUBDB-2022-00633

Abstract: The mechanical properties after tempering and intercritical annealing of medium manganese steels with 4 wt% Mn for forging applications are presented. After forging with subsequent air cooling, heat treatments were performed, specifically tempering from 250 and 450 °C and intercritical annealing between 600 and 675 °C. Tensile properties, Charpy V-notch impact toughness, and hardness were determined and compared with microstructural features characterized by metallography and synchrotron measurements, leading to the classification of six different heat treatment stages for medium manganese steels. Furthermore, the effects of different alloying additions (boron 0.0016–0.0057 wt%, molybdenum 0.2 wt%, and aluminum 0.5 wt%) are discussed with respect to the mechanical properties. It is shown that boron increases the impact toughness more effectively in the tempering regime, while the molybdenum alloyed samples exhibit higher toughness after intercritical annealing. Most of the materials and heat treatment states follow the inverse relationship between toughness and strength, while the aluminum alloyed samples show a superior toughness after tempering.

Note: The synchrotronhigh-energy X-ray diffraction (HEXRD) measurements were conducted atthe Powder Diffraction and Total Scattering Beamline P02.1 of PETRA III atDESY (Proposal No.: I-20191072), a member of the Helmholtz Association(HGF), which is gratefully acknowledged. Dr. Wenwen Song and Dr. Yan

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P02.1 (PETRA III)

Appears in the scientific report 2021

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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