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Metals
Special Issues
Processing of Advanced High Strength Steel (AHSS)
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Processing of Advanced High Strength Steel (AHSS)

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 2732

Special Issue Editor

Dr. Kornél Májlinger

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
Interests: duplex stainless steel (DSS) welding; high-strength austenitic steel welding; role of nitrogen in DSS welding; role of nitrogen in austenitic steel welding, ultrahigh-strength steel (UHSS) welding; microstructure investigations
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue follows up the previous SI titled, Welding of Advanced High-Strength Steel (AHSS): https://0-www-mdpi-com.brum.beds.ac.uk/journal/metals/special_issues/welding_AHSS

To achieve effective weight reduction of steel structures from pressure wessels to car body parts, higher and higher strength steels with smaller wall thicknesses are being used. Therefore, the trend in steel manufacturing is to produce types of steel with higher and higher strengths, e.g., thermomechanically processed and quenched and tempered (Q&T) high-strength structural steels, dual and complex phase (DP and CP) steels, transformation and twinning induced plasticity (TRIP and TWIP) steels, and martensitic steel grades reaching nearly 2000 MPa of ultimate tensile strength. Additionally, the needs of the chemical industry inspired steel manufacturers to develop high-strength corrosion-resistant steel grades, such as duplex (DSS), martensitic, precipitation-hardened (PH), and nitrogen-alloyed austenitic stainless steels.

The best joint efficiency for steels can be achieved by welding processes, but determining the proper welding technology for newly developed high-strength steel grades is highly challenging for welding engineers.

Therefore, original research papers are invited on research into advanced high-strength steel (AHSS) welding, preferably welding AHSSs in the ultra high strength steel range (UHSS), where the ultimate tensile strength is above 800 MPa.

Studies of novel and conventional welding techniques are invited, addressing specific problems in the welding of AHSSs in order to support further industrial application. Additionally, studies on newly developed welding techniques for AHSS grades are invited, with the emphasis of possible industrial usage.

Dr. Kornél Májlinger
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • advanced high-strength steel (AHSS) processing
  • ultrahigh-strength steel (UHSS) processing
  • duplex stainless steel (DSS) processing
  • high-strength austenitic steel processing
  • precipitation-hardened (PH) stainless steel processing
  • dual phase (DP) steel processing
  • transformation-induced plasticity (TRIP) steel processing
  • twinning-induced plasticity (TWIP) steel processing
  • martensitic ultrahigh-strength steel processing

Published Papers (1 paper)

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Research

19 pages, 6442 KiB  
Article
An Approach to Assessing S960QL Steel Welded Joints Using EBW and GMAW
by Raghawendra Pratap Singh Sisodia and Marcell Gáspár
Metals 2022, 12(4), 678; https://0-doi-org.brum.beds.ac.uk/10.3390/met12040678 - 15 Apr 2022
Cited by 9 | Viewed by 2183
Abstract
In recent years, ultra-high-strength structural (UHSS) steel in quenched and tempered (Q+T) conditions, for example, S960QL has been found in wider application areas such as structures, cranes, and trucks due to its extraordinary material properties and acceptable weldability. The motivation of the study [...] Read more.
In recent years, ultra-high-strength structural (UHSS) steel in quenched and tempered (Q+T) conditions, for example, S960QL has been found in wider application areas such as structures, cranes, and trucks due to its extraordinary material properties and acceptable weldability. The motivation of the study is to investigate the unique capabilities of electron beam welding (EBW) compared to conventional gas metal arc welding (GMAW) for a deep, narrow weld with a small heat-affected zone (HAZ) and minimum thermal distortion of the welded joint without significantly affecting the mechanical properties. In this study, S960QL base material (BM) specimens with a thickness of 15 mm were butt-welded without filler material at a welding speed of 10 mm/s using the high-vacuum (2 × 10−4 mbar) EBW process. Microstructural characteristics were analyzed using an optical microscope (OM), a scanning electron microscope (SEM), fractography, and an electron backscatter diffraction (EBSD) analysis. The macro hardness, tensile strength, and instrumented Charpy-V impact test were performed to evaluate the mechanical properties. Further, the results of these tests of the EBW joints were compared with the GMAW joints of the same steel grade and thickness. Higher hardness is observed in the fusion zone (FZ) and the HAZ compared to the BM but under the limit of qualifying the hardness value (450 HV10) of Q+T steels according to the ISO 15614-11 specifications. The tensile strength of the EBW-welded joint (1044 MPa) reached the level of the BM as the specimens fractured in the BM. The FZ microstructure consists of fine dendritic martensite and the HAZ predominantly consists of martensite. Instrumented impact testing was performed on Charpy-V specimens at −40 °C, which showed the brittle behavior of both the FZ and HAZ but to a significantly lower extent compared to GMAW. The measured average impact toughness of the BM is 162 J and the average impact toughness value of the HAZ and FZ are 45 ± 11 J and 44 ± 20 J, respectively. Full article
(This article belongs to the Special Issue Processing of Advanced High Strength Steel (AHSS))
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