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Effect of Thermo-Mechanical Treatment on the Properties of Metals and...
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Effect of Thermo-Mechanical Treatment on the Properties of Metals and Alloys

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

Deadline for manuscript submissions: closed (20 December 2022) | Viewed by 3872

Special Issue Editor

Prof. Dr. Rui Cao

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Interests: metals and alloys; composite materials; metals and alloys for additive manufacturing; metals and alloys for welding and joining; metals and alloys for advanced manufacturing; thermal treatment; fatigue; fracture; electron backscattered diffraction (EBSD) characterization; in situ experiments; thermal simulated experiments; laser confocal microscopy; thermomechanical treatment; high energy synchrotron diffraction; transmission electron microscope (TEM) characterization; atom probe tomography (APT); focused Ion beam (FIB); phase transformations; relationships between microstructure and properties; thermomechanical behavior

Special Issue Information

Dear Colleagues,

With the development of metals and alloys in the aerospace and automobile and nuclear power, the thermal-mechanical behaviors of metals and alloys need to be systematically revealed. For example, during the welding and joining of various parts, thermal-mechanical treatments have an important effect on the microstructures and properties of welded joints. During the rolling processes, thermal-mechanical treatments affect the deformation behaviors, evolution of microstructures, and change of properties. Moreover, thermal-mechanical processes are usually produced in actual engineering service processes. Thermal-mechanical processes affect the evolution of the microstructure, change the deformation behavior and fracture mechanisms, deteriorate the properties, and finally determine the service life.

The present Special Issue contributes to systematically understanding the thermomechanical behavior of metals and alloys with various manufacturing methods under various processing, manufacturing, or service conditions. I am very pleased to invite you to submit contributions about the thermomechanical behavior of metals and alloys with various manufacturing methods under the various processing, manufacturing, or service conditions.

Prof. Dr. Rui Cao
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. 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

  • metal and alloys
  • composite materials
  • welding and joining
  • additive manufacturing
  • rolling
  • in situ experiments
  • thermal simulated experiments
  • atom probe tomography
  • thermal treatment
  • fatigue
  • fracture
  • thermomechanical behavior

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Published Papers (2 papers)

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Research

15 pages, 27064 KiB  
Article
Effect of Heat Treatment on the Microstructure and Properties of Ti600/TC18 Joints by Inertia Friction Welding
by Yingying Liu, Kaixin Ren, Wantao Tian, Xiaolong Shangguan, Siyu Tan and Qihao Yang
Materials 2023, 16(1), 392; https://doi.org/10.3390/ma16010392 - 31 Dec 2022
Cited by 7 | Viewed by 2120
Abstract
The Ti600/TC18 dissimilar titanium alloy joints were prepared by inertia friction welding (IFW). Then, stress-relief annealing and two-stage annealing were performed to optimize the microstructure and properties of the original joints, the purpose of them is to improve the structure and performance of [...] Read more.
The Ti600/TC18 dissimilar titanium alloy joints were prepared by inertia friction welding (IFW). Then, stress-relief annealing and two-stage annealing were performed to optimize the microstructure and properties of the original joints, the purpose of them is to improve the structure and performance of the joints. Then, the microstructure, phase composition, tensile properties, microhardness, and fracture morphology of the joints after heat treatments were investigated. The results showed that after stress-relief annealing, the microstructure of the joints was almost similar to that of the specimen before annealing; the weld zone (WZ) of the joints was composed of fine recrystallized grains and α′, and the more β phases underwent a martensitic transformation. The shapes and sizes of αp phases were increased after two-stage annealing; its percentage content was decreased. The tensile properties and the microhardness values of the joints undergoing stress-relief annealing were relatively higher than that of the joints undergoing two-stage annealing; there was no obvious change in the plasticity of the joints. It was confirmed that the stress-relief annealing microstructure was composed of α′ and β phases, which were beneficial to the properties of the joints. However, the αs phases were coarsened after two-stage annealing, and the properties of the joints were reduced. Full article
(This article belongs to the Special Issue Effect of Thermo-Mechanical Treatment on the Properties of Metals and Alloys)
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Graphical abstract

18 pages, 8581 KiB  
Article
Thermo-Mechanical Processing as Method Decreasing Delta-Ferrite and Improving the Impact Toughness of the Novel 12% Cr Steels with Low N and High B Contents
by Alexandra Fedoseeva, Anastasiia Dolzhenko and Rustam Kaibyshev
Materials 2022, 15(24), 8861; https://doi.org/10.3390/ma15248861 - 12 Dec 2022
Cited by 3 | Viewed by 1405
Abstract
The universal thermo-mechanical processing including the interim long-term annealing together with forging for three 12% Cr martensitic steels with different alloying. This thermo-mechanical processing remarkably increases the impact toughness of these steels in wide temperature ranges and reduces the ductile-brittle transition temperature by [...] Read more.
The universal thermo-mechanical processing including the interim long-term annealing together with forging for three 12% Cr martensitic steels with different alloying. This thermo-mechanical processing remarkably increases the impact toughness of these steels in wide temperature ranges and reduces the ductile-brittle transition temperature by 10–20 K. There is a 25 °C impact toughness of all 12% Cr steels subjected to the thermo-mechanical processing exceeds 60 J cm−2. Such an increment in impact toughness is accompanied with the significant changes in the structures of all 12% Cr steels with different alloying. The common feature for all 12% Cr steels subjected to the thermo-mechanical processing is found to be a noticeable decrease in delta-ferrite amount. In the steels containing Ta, the decrease in the mean size of prior austenite grains by 20–26% was revealed. For the 12% Cr steels with ultra-low N content, the thermo-mechanical processing provides the changes in the dispersion of M23C6 carbides and MX carbonitrides. Full article
(This article belongs to the Special Issue Effect of Thermo-Mechanical Treatment on the Properties of Metals and Alloys)
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