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Journal of Materials Engineering and Performance

Erschienen in:

23.10.2019

Softening Behavior of Electron Beam Welded 22SiMn2TiB Steel

verfasst von: Junqiang Xu, Yong Peng, Shun Guo, Qi Zhou, Jun Zhu, Xiaopeng Li

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 11/2019

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Abstract

Softening behavior occurs in heat-affected zone of many types of high strength steels causing the deterioration of mechanical properties. In this study, the softening behavior of 22SiMn2TiB joint was revealed by experimental and numerical analysis. The microstructure and hardness of the joint were tested and analyzed. The numerical simulations of the temperature field were carried out to obtain the thermal cycle. Based on the continuous cooling transformation diagram, the phase transformation was investigated. The results indicated that the microhardness in the HAZ was significantly decreased, and its minimum value was 273 HV which was 63.5% of base metal. The softening behavior occurs in intermediate critical heat-affected zone and the subcritical heat-affected zone, and its peak temperature is between 853.7 °C (Ac₃) and 450 °C. When 22SiMn2TiB steel was heated above 732.3 °C (Ac₁), martensite begins to transform into austenite. With different cooling rates, austenite may transform into martensite, bainite and ferrite, and the volume fraction of soft phases could increase resulting in the softening. When the peak temperature is between 732.3 and 450 °C, the recovery phenomenon and the decomposition of martensite caused softening with the decrease in the dislocation density and martensite.

Vorheriger Artikel Comparative In Vitro Evaluation Between Zirconia and Veneer Ceramic Materials Using Different Techniques

Nächster Artikel Influence of Combined Severe Plastic Deformation and Sheet Extrusion Process on the Superplastic Formability of AA 5083 Aluminum Alloy Assessed by Free Bulge Test

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Titel: Softening Behavior of Electron Beam Welded 22SiMn2TiB Steel
verfasst von: Junqiang Xu
Yong Peng
Shun Guo
Qi Zhou
Jun Zhu
Xiaopeng Li
Publikationsdatum: 23.10.2019
Verlag: Springer US
Erschienen in: Journal of Materials Engineering and Performance / Ausgabe 11/2019
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-019-04366-8

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