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Advanced Special and High-Strength Steels
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Advanced Special and High-Strength Steels

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".

Deadline for manuscript submissions: closed (20 October 2023) | Viewed by 1688

Special Issue Editors

Prof. Dr. Mingyue Sun

E-Mail Website
Guest Editor
1. Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Interests: special steel; advanced high strength steel; high temperature alloy; additive forging; materials characterization; hot deformation process; casting; forging; heat treatments; dynamic recrystallization; interface bonding
Prof. Dr. Jianfeng Gu

E-Mail Website
Guest Editor
Institute of Materials Modification and Modeling, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Interests: heat treatment of heavy casting and forging; multi-scale simulation of materials microstructure and mechanical behavior

Special Issue Information

Dear Colleagues,

High-quality special steel is widely used in every field of life and society and is the key material required in major equipment manufacturing and key engineering construction. High-quality special steel, with its high clean purification, high homogenization, and high grain refining requirements, directly determines the product quality and application performance of special steel materials. Clean purification mainly includes the removal of the main elements of impurity in the steel and controlling nonmetallic inclusions in the steel such that they remain harmless. Homogenization mainly refers to the segregation of elements and the uniform distribution of various precipitated phases. Grain refining mainly refers to the grain refinement and uniform structure of the steel. Clean purification, homogenization, and grain refining, involving smelting, refining, casting, forging, rolling, heat treatment, service, and other life cycles, is the key to preparing advanced special steel materials.

The main goal of the Special Issue is to highlight original research articles and review papers concerning the metallurgy, materials, processing, heat treatment, macro-/micro-structure and mechanical properties of special steel.

The main topics to be covered in this Special Issue are (but not limited to) the following:

  • Pure smelting and special melting process research and development of special steel;
  • Metallurgical defects and microstructure control of special steel;
  • Development and research of cold and hot processing and forming technology of special steel;
  • Composition design, microstructure, and performance control of special steel through heat treatment

Prof. Dr. Mingyue Sun
Prof. Dr. Jianfeng Gu
Guest Editors

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. Materials is an international peer-reviewed open access semimonthly 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

  • special steel
  • high-strength steel
  • casting
  • forging
  • forming
  • heat treatments
  • composition and processing design
  • microstructure
  • mechanical properties

Published Papers (2 papers)

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Research

20 pages, 14132 KiB  
Article
Research on Forming Limit Stress Diagram of Advanced High Strength Dual-Phase Steel Sheets
by Hongjian Cui, Di Li, Qiutao Fu, Zipeng Lu, Jiachuan Xu and Ning Jiang
Materials 2023, 16(13), 4543; https://doi.org/10.3390/ma16134543 - 23 Jun 2023
Cited by 1 | Viewed by 880
Abstract
The Forming Limit Stress Diagram (FLSD) can accurately describe the forming process of high-strength steel. However, obtaining FLSD is relatively difficult. In order to predict fracture in advanced high-strength dual-phase (DP) steels, limit maximum and limit minimum principal strains of sheet were obtained [...] Read more.
The Forming Limit Stress Diagram (FLSD) can accurately describe the forming process of high-strength steel. However, obtaining FLSD is relatively difficult. In order to predict fracture in advanced high-strength dual-phase (DP) steels, limit maximum and limit minimum principal strains of sheet were obtained through multiple sets of test and simulation. Two material parameters, strength coefficient K and hardening exponent n are introduced into the FLSD function which is established by the strain-stress transformation function. The function shows that the k-value determines the value of the maximum principal stress, while the n-value affects the curvature of the curve. Verification of correctness by testing and simulation to within 10% accuracy. This paper explores a new approach to FLSD research based on material properties, which can expand the application scope of FLSD. Full article
(This article belongs to the Special Issue Advanced Special and High-Strength Steels)
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15 pages, 9508 KiB  
Article
Evolution of Toughening Mechanisms in PH13-8Mo Stainless Steel during Aging Treatment
by Honglin Zhang, Peng Mi, Luhan Hao, Haichong Zhou, Wei Yan, Kuan Zhao, Bin Xu and Mingyue Sun
Materials 2023, 16(10), 3630; https://doi.org/10.3390/ma16103630 - 10 May 2023
Cited by 2 | Viewed by 1231
Abstract
PH13-8Mo stainless steel has been widely used in aerospace, petroleum and marine construction, obtaining continuous investigation attention in recent years. Based on the response of a hierarchical martensite matrix and possible reversed austenite, a systematic investigation of the evolution of the toughening mechanisms [...] Read more.
PH13-8Mo stainless steel has been widely used in aerospace, petroleum and marine construction, obtaining continuous investigation attention in recent years. Based on the response of a hierarchical martensite matrix and possible reversed austenite, a systematic investigation of the evolution of the toughening mechanisms in PH13-8Mo stainless steel as a function of aging temperature was carried out. It showed there was a desirable combination of high yield strength (~1.3 GPa) and V-notched impact toughness (~220 J) after aging between 540 and 550 °C. With the increase of aging temperature, the martensite matrix was recovered in terms of the refined sub-grains and higher ratio of high-angle grain boundaries (HAGBs). It should be noted there was a reversion of martensite to form austenite films subjected to aging above 540 °C; meanwhile, the NiAl precipitates maintained a well-coherent orientation with the matrix. Based on the post mortem analysis, there were three stages of the changing main toughening mechanisms: Stage I: low-temperature aging at around 510 °C, where the HAGBs contributed to the toughness by retarding the advance of cracks; Stage II: intermediate-temperature aging at around 540 °C, where the recovered laths embedded by soft austenite facilitated the improvement of toughness by synergistically increasing the advance path and blunting the crack tips; and Stage III: without the coarsening of NiAl precipitates around 560 °C, more inter-lath reversed austenite led to the optimum toughness, relying on “soft barrier” and transformation-induced plasticity (TRIP) effects. Full article
(This article belongs to the Special Issue Advanced Special and High-Strength Steels)
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