scholarly journals Mechanical Properties and Fractographic Analysis of High Manganese Steels After Dynamic Deformation Tests

2014 ◽  
Vol 59 (3) ◽  
pp. 1193-1197 ◽  
Author(s):  
M.B. Jabłońska
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
Dynamic Test ◽  
High Sensitivity ◽  
High Strength ◽  
Dynamic Mechanical Properties ◽  
High Manganese ◽  
High Manganese Steels ◽  
Conducting Research ◽  
Manganese Steels

Abstract Since few years many research centres conducting research on the development of high-manganese steels for manufacturing of parts for automotive and railway industry. Some of these steels belong to the group of AHS possessing together with high strength a great plastic elongation, and an ideal uniform work hardening behavior. The article presents the dynamic mechanical properties of two types of high manganese austenitic steel with using a flywheel machine at room temperature with strain rates between 5×102÷3.5×103s?–1. It was found that the both studied steels exhibit a high sensitivity Rm to the strain rate. With increasing the strain rate from 5×102 to 3.5×103s?–1 the hardening dominates the process. The fracture analysis indicate that after dynamic test both steel is characterized by ductile fracture surfaces which indicate good plasticity of investigated steels.

scholarly journals From High-Manganese Steels to Advanced High-Entropy Alloys

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 726 ◽  
Author(s):  
Christian Haase ◽  
Luis Antonio Barrales-Mora
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Structural Material ◽  
High Entropy Alloys ◽  
High Manganese ◽  
High Entropy ◽  
Design Concepts ◽  
Physical Mechanisms ◽  
High Manganese Steels ◽  
Manganese Steels

Arguably, steels are the most important structural material, even to this day. Numerous design concepts have been developed to create and/or tailor new steels suited to the most varied applications. High-manganese steels (HMnS) stand out for their excellent mechanical properties and their capacity to make use of a variety of physical mechanisms to tailor their microstructure, and thus their properties. With this in mind, in this contribution, we explore the possibility of extending the alloy design concepts that haven been used successfully in HMnS to the recently introduced high-entropy alloys (HEA). To this aim, one HMnS steel and the classical HEA Cantor alloy were subjected to cold rolling and heat treatment. The evolution of the microstructure and texture during the processing of the alloys and the resulting properties were characterized and studied. Based on these results, the physical mechanisms active in the investigated HMnS and HEA were identified and discussed. The results evidenced a substantial transferability of the design concepts and more importantly, they hint at a larger potential for microstructure and property tailoring in the HEA.

scholarly journals The Influence of Warm Rolling on Microstructure and Deformation Behavior of High Manganese Steels

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 797 ◽  
Author(s):  
Haupt ◽  
Müller ◽  
Haase ◽  
Sevsek ◽  
Brasche ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Warm Rolling ◽  
Deformation Mechanisms ◽  
Thickness Reduction ◽  
High Manganese ◽  
Active Deformation ◽  
High Manganese Steels ◽  
Rolling Deformation ◽  
Manganese Steels

In this work, a Fe23Mn0.3C1Al high manganese twinning-induced plasticity (TWIP) steel is subjected to varying warm rolling procedures in order to increase the yield strength and maintain a notable ductility. A comprehensive material characterization allows for the understanding of the activated deformation mechanisms and their impact on the resulting microstructure, texture, and mechanical properties. The results show a significant enhancement of the yield strength compared to a fully recrystallized Fe23Mn0.3C1Al steel. This behavior is mainly dominated by the change of the active deformation mechanisms during rolling. Deformation twinning is very pronounced at lower temperatures, whereas this mechanism is suppressed at 500 °C and a thickness reduction of up to 50%. The mechanical properties can be tailored by adjusting rolling temperature and thickness reduction to desired applications.

High Manganese TWIP Steel - Technological Plasticity and Selected Properties

2013 ◽  
Vol 212 ◽  
pp. 87-90 ◽  
Author(s):  
Magdalena Jabłońska ◽  
Grzegorz Niewielski ◽  
Rudolf Kawalla
Keyword(s):  
High Strength ◽  
Mechanical Twinning ◽  
High Manganese ◽  
Rate Analysis ◽  
Railway Industry ◽  
Plastic Forming ◽  
New Type ◽  
High Manganese Steels ◽  
Conducting Research ◽  
Deformation Tests

Over the last few years national as well as international research centres conducting research on the development of high-manganese steels. Some of these materials belong to the group of AHS steels, are characterized by the twinning induced plasticity (TWIP) effect which is a new type of steel possessing together with high strength a great plastic elongation, and an ideal uniform work hardening behavior. It is therefore a good candidate for deep drawing applications in the automobile and railway industry. The article presents the results of researches of TWIP-type austenitic steel in case of determination some of the more important parameters for continuous casting simulation process and the results of tests regarding the influence of strain parameters on sensitivity to plastic forming and deformation strengthening. It has been shown that the researched steel reaches a zero plasticity temperature at 1250°C. The deformation tests indicate its good workability of hot processing within the temperature range of 1100 ÷ 800°C. The relation between yield stress and strain during the hot deformation is typical for the presence of dynamic recrystallization processes. The tested steel has good formability and high mechanical properties, especially when being deformed at a high strain rate. Analysis of the substructure of researched steel was indicate presence of mechanical twinning.

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