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Metals
Special Issues
Microstructure, Tensile Properties and Creep Behavior of Metallic Materials
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Microstructure, Tensile Properties and Creep Behavior of Metallic Materials

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

Deadline for manuscript submissions: 25 October 2025 | Viewed by 1790

Special Issue Editors

Dr. Youliang Yang

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Guest Editor
Light Alloys Research Institute, Central South University, Changsha 410083, China
Interests: creep; stress relaxation; constitutive modeling; microstructural characterization
Dr. Ziyao Ma

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Guest Editor
College of Engineering, Peking University, Beijing 100871, China
Interests: creep behavior; multi-scale modeling; microstructural evolution
Prof. Dr. Lihua Zhan

E-Mail Website
Guest Editor
Light Alloys Research Institute, Central South University, Changsha 410083, China
Interests: complicate component; creep age forming; aluminum alloy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Under sustained stress, metallic materials undergo creep deformation at a low strain rate, which can been seen in various industries. For example, in the field of forming manufacturing, creep can be used to shape large sheet metal components, while for the supercritical power generating units, creep at high temperatures can reduce the reliability of components. During the creep process, time-varying dislocations, grains, second phases and other microstructures are interact, making the microstructural evolution extremely complex and affecting the macroscopic mechanical properties of the metallic material. Understanding the microscopic mechanism of this process is of great significance for the effective regulation of material properties and reliable prediction of material life.

In this Special Issue, we welcome research on the creep behavior of metallic materials ranging from their microstructural evolution to their macroscopic properties. Cross-scale analysis is of particular interest.

Dr. Youliang Yang
Dr. Ziyao Ma
Prof. Dr. Lihua Zhan
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

  • creep behavior
  • microstructural evolution
  • multi-scale modeling
  • dislocations
  • grains
  • second phases

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Published Papers (2 papers)

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Research

10 pages, 10776 KiB  
Article
Evolution of Stress Rupture Property for K439B Superalloy During Long-Term Thermal Exposure at 800 °C
by Yidong Wu, Xinghai Qu, Lei Gao, Chaoqian Song, Zhao Dong, Jingyang Chen and Xidong Hui
Metals 2024, 14(12), 1461; https://doi.org/10.3390/met14121461 - 20 Dec 2024
Viewed by 622
Abstract
The K439B superalloy is widely utilized in aeroengine components due to its superior weldability and mechanical performance. Given that the hot-end components of aeroengines typically operate at high temperatures for extended periods, even up to 10,000 h, it is essential to investigate the [...] Read more.
The K439B superalloy is widely utilized in aeroengine components due to its superior weldability and mechanical performance. Given that the hot-end components of aeroengines typically operate at high temperatures for extended periods, even up to 10,000 h, it is essential to investigate the stress rupture properties and deformation mechanisms of K439B alloy after prolonged thermal exposure. In this work, thermal exposure at 800 °C for 6000, 8000, and 10,000 h was conducted for the K439B superalloy. Unlike the samples with aging times less than 6000 h, for the samples aged between 6000 and 10,000 h, the stress rupture life at 815 °C/379 MPa decreased slowly, from 47.3 to 39.1 h. Creep cracks typically originate at metal carbides (MC type) and subsequently propagate along grain boundaries. Notably, the creep deformation mechanism shifts under varying aging conditions. After 6000 h of aging, the deformation mechanism is primarily governed by Orowan bypassing and isolated stacking fault shearing. As the aging period increases further, the γ′ precipitates progressively coarsen, and isolated stacking faults become more prevalent, ultimately reducing the creep resistance of the alloy. Full article
(This article belongs to the Special Issue Microstructure, Tensile Properties and Creep Behavior of Metallic Materials)
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14 pages, 6339 KiB  
Article
Effect of Precipitates on Dislocation Loops in Vanadium Alloy After Irradiation with 60 keV Deuterium Ions at Room Temperature
by Jing Wang, Mingxin Chen, Yifan Zhang, Bing Ma, Haiyan Jiang and Chang Chen
Metals 2024, 14(12), 1435; https://doi.org/10.3390/met14121435 - 14 Dec 2024
Viewed by 676
Abstract
The effect of different precipitates and nanoparticles on the distribution of radiation-induced dislocation loops in V-4Cr-4Ti alloy and V-4Cr-4Ti-1.8Y-0.4Ti3SiC2 alloy were studied. Both alloys were irradiated with 60 keV deuterium, and the distribution of the dislocation loops was statistically analyzed [...] Read more.
The effect of different precipitates and nanoparticles on the distribution of radiation-induced dislocation loops in V-4Cr-4Ti alloy and V-4Cr-4Ti-1.8Y-0.4Ti3SiC2 alloy were studied. Both alloys were irradiated with 60 keV deuterium, and the distribution of the dislocation loops was statistically analyzed using the transmission electron microscope (TEM) technique. The results indicated that platelet-like Ti(CNO) precipitates affect the dislocation distribution, in which a significantly reduced dislocation number density in the area within 20 nm of the interface was observed. This phenomenon is attributed to the strong compressive strain in the vertical interface direction at the precipitates/matrix interface. No significant effect on loop distribution was observed in the coherent TiC/matrix interface, which may result from the almost no strain interface. In addition, the uniform distribution of radiation-induced dislocation loops in equivalent crystal orientation was confirmed via the TEM images with multiple g vectors. Full article
(This article belongs to the Special Issue Microstructure, Tensile Properties and Creep Behavior of Metallic Materials)
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