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Metals
Special Issues
Microstructure and Properties of Rolled Alloys
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Microstructure and Properties of Rolled Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Casting, Forming and Heat Treatment".

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 10002

Special Issue Editors

Prof. Dr. Hailiang Yu

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Guest Editor
State Key Laboratory of High Performance Complex Manufacturing, Light Alloys Research Institute, Central South University, Changsha 410083, China
Interests: metals and alloys; metal forming; microstructure and properties
Prof. Dr. Liqing Chen

E-Mail Website
Guest Editor
State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
Interests: metals and alloys; metal forming; microstructure and properties
Special Issues, Collections and Topics in MDPI journals
Dr. Haitao Gao

E-Mail Website
Guest Editor
State Key Laboratory of High Performance Complex Manufacturing, Light Alloys Research Institute, Central South University, Changsha 410083, China
Interests: metal composite sheets; cryorolling; core-filled steel tube; green manufacturing; metal foil
Special Issues, Collections and Topics in MDPI journals
Dr. Yun Zhang

E-Mail Website
Guest Editor
State Key Laboratory of High Performance Complex Manufacturing, Light Alloys Research Institute, Central South University, Changsha 410083, China
Interests: metals and alloys; metal forming; microstructure and properties

Special Issue Information

Dear Colleagues,

Roll forming is an important aspect of advanced manufacturing technologies, which has the significant advantages of reducing energy consumption and cost, improving the comprehensive performance of metals and alloys, high production efficiency, and a wide application range. In recent years, rolling technology has made great progress in the control and regulation of material structures and properties, and takes the leading role in the application of automation and information technology. The aim of this Special Issue, "Microstructure and Properties of Rolled Alloy", is to showcase the latest progress and achievements of rolling technology in the field of material preparation; to summarize the future directions, key technologies, and recurrent issues in this field; and to promote the innovation and application of rolling technology. Researchers that have engaged in the roll forming of Cu alloys, Al alloys, Ti alloys, Mg alloys, Ni alloys, steel, high entropy alloys, and other alloy materials are invited to submit articles for publication.

Prof. Dr. Hailiang Yu
Prof. Dr. Liqing Chen
Dr. Haitao Gao
Dr. Yun Zhang
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. 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

  • metals and alloys
  • mechanical properties
  • rolling
  • microstructure

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Published Papers (3 papers)

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Research

12 pages, 8728 KiB  
Article
Variant Pairing of Lath Bainite and Martensite in an Ultra-High-Strength Steel
by Meiying Li, Shun Wang, Tao Jia and Xianming Zhao
Metals 2022, 12(11), 1896; https://doi.org/10.3390/met12111896 - 5 Nov 2022
Cited by 1 | Viewed by 1815
Abstract
The mixed structure of lath bainite and martensite was obtained by isothermal transformation tests at 698 K, 673 K and 623 K in ultra-high-strength steel. The interweaving mode of lath bainite and martensite was revealed by colored metallography and band contrast maps based [...] Read more.
The mixed structure of lath bainite and martensite was obtained by isothermal transformation tests at 698 K, 673 K and 623 K in ultra-high-strength steel. The interweaving mode of lath bainite and martensite was revealed by colored metallography and band contrast maps based on Gaussian fit. The crystallographic characteristics were analyzed in terms of variant pairing. The twin-related V1/V2 variant pairs were found in the region with high band contrast (BC) values, inferred as lath bainite. While in the low-BC value region, which was inferred as lath martensite, besides the dominated twin-related V1/V2 variant pair, V1/V4 variant pairs with low-angle grain boundaries were occasionally revealed. According to the classification by Takayama et al., both variant pairings of lath bainite and martensite in this work correspond to a type II mode. The present work has confirmed, even with complex microstructure, i.e., mixed lath bainite and martensite were formed depending on the processing route, bainite and martensite still follow their own rules of variant pairing. Full article
(This article belongs to the Special Issue Microstructure and Properties of Rolled Alloys)
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23 pages, 4957 KiB  
Article
Hot Deformation Behavior of C-Mn Steel with Incomplete Recrystallization during Roughing Phase with and without Nb Addition
by Grega Klančnik, Jan Foder, Boštjan Bradaškja, Mina Kralj, Urška Klančnik, Paul Lalley and Douglas Stalheim
Metals 2022, 12(10), 1597; https://doi.org/10.3390/met12101597 - 25 Sep 2022
Cited by 5 | Viewed by 1765
Abstract
The objective of the study is to improve understanding of the practical role of niobium (Nb) in the case of industrial inconsistent rolling processes such as the rolling of heavy gauge plates where a lower stored energy rolling practice will result in a [...] Read more.
The objective of the study is to improve understanding of the practical role of niobium (Nb) in the case of industrial inconsistent rolling processes such as the rolling of heavy gauge plates where a lower stored energy rolling practice will result in a less stable and less repeatable static recrystallization (SRX) activation that prevents complete recrystallization. In the current study, these variabilities are validated by comparing the mean flow stress (MFS) indirectly determined from the rolling force measured on a reverse four-high rolling mill stand. The material resistance to deformation and grain size evolution of a C-Mn steel during hot rolling was observed and validated with and without Nb addition. The pre-defined rolling schedule was predicted to exhibit incomplete recrystallization in the roughing phase due to the limited stored energy of deformation that resulted from low rolling loads and a higher number of rolling passes. The prior austenite grain size (PAGS) distribution was predicted and compared to the measured effective ferrite grain (FG) size distribution after the completion of hot rolling and phase transformation achieved using natural air plate cooling. Both the predicted PAG and measured FG distributions revealed the presence of multimodality, and both distributions were used for grain size reduction factor determination for γ → α transformation for the current study with 1.96 for 0 Nb and 1.70 for 240 Nb. The results presented in this paper are not only limited to the rolling schedule used in this paper because instabilities resulting in incomplete austenite conditioning are also observed when evaluating the cross-sections of other heavy plates and various steel grades utilizing different processing routes with comparable compositions such as modern lean abrasion-resistant steels, regular line pipe steels, and other similar grades. Full article
(This article belongs to the Special Issue Microstructure and Properties of Rolled Alloys)
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12 pages, 7213 KiB  
Article
Study on Mechanical Properties and Microstructure of FeCoCrNi/Al Composites via Cryorolling
by Kaiguang Luo, Yuze Wu, Yun Zhang, Gang Lei and Hailiang Yu
Metals 2022, 12(4), 625; https://doi.org/10.3390/met12040625 - 4 Apr 2022
Cited by 4 | Viewed by 3297
Abstract
Aluminum matrix composites (AMCs) reinforced by 1.5 and 3 wt% FeCoCrNi high-entropy alloy particles (HEAp) were obtained by a stir casting process. The AMCs strip was further prepared by room temperature rolling (RTR, 298 K) and cryorolling (CR, 77 K). The mechanical properties [...] Read more.
Aluminum matrix composites (AMCs) reinforced by 1.5 and 3 wt% FeCoCrNi high-entropy alloy particles (HEAp) were obtained by a stir casting process. The AMCs strip was further prepared by room temperature rolling (RTR, 298 K) and cryorolling (CR, 77 K). The mechanical properties of the AMCs produced by RTR and CR were studied. The effect of a microstructure on mechanical properties of composites was analyzed by scanning electron microscopy (SEM). The results show that CR can greatly improve the mechanical properties of the HEAp/AMCs. Under 30% rolling reduction, the ultimate tensile strength (UTS) of the RTR 1.5 wt% HEAp/AMCs was 120.3 MPa, but it increased to 139.7 MPa in CR composites. Due to the volume shrinkage effect, the bonding ability of CR HEAp/AMCs reinforcement with Al matrix was stronger, exhibiting higher mechanical properties. Full article
(This article belongs to the Special Issue Microstructure and Properties of Rolled Alloys)
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