Article
Materials Science, Multidisciplinary
L. Y. Li, C. H. Sun, Y. Ruan, B. Wei
Summary: The α/γ phase selection mechanism and corrosion resistance of Fe-21%Cr-12%Ni-5%Mo alloy were investigated using both individual electromagnetic levitation (EML) and EML coupled with falling quench (EML+FQ) techniques. The decomposition of primary δ phase could be partially or completely suppressed in both containerless processing methods. Both selective and pitting corrosion behaviors were observed in the alloy, which were influenced by the crystalline orientations and solute distributions of the constituent phases. The anti-corrosion property of the EML+FQ processed alloy was significantly improved, with a higher corrosion potential of 0 VSCE, lower corrosion current density of 4.1 x 10-7 A/cm2, and a decrease in corrosion rate by one order of magnitude.
Article
Materials Science, Multidisciplinary
Lei Wang, Reza Darvishi Kamachali
Summary: This research utilized a density-based model to calculate multi-component grain boundary phase diagrams and studied the Fe-Mn-Cr, Fe-Mn-Ni, Fe-Mn-Co, Fe-Cr-Ni, and Fe-Cr-Co alloy systems. The study found that despite solute segregation enrichment, a grain boundary may have a lower solubility limit than the bulk, promoting interfacial chemical decomposition.
Article
Materials Science, Multidisciplinary
L. Y. Li, Y. Ruan, B. Wei
Summary: The tribological performance of a quaternary Fe-13 pct Ni-10 pct Mo-5 pct Cr alloy was studied using electromagnetic levitation and drop tube techniques. The wear rate and friction coefficient of the alloy decreased with increased undercooling, with the alloy processed by drop tube having the lowest values. The improvement in tribological properties was attributed to solid solution strengthening and dispersion strengthening in electromagnetic levitation and fine-grained reinforcement in drop tube conditions.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Hongyu Liu, Tao Wang, Xuefeng Guo, Feng Feng, Yunhai Su
Summary: The research shows that adding an appropriate amount of nitrogen to Fe-Cr-Ni-Mo-Mn alloy can improve the corrosion resistance of the surface metal, with the best performance achieved when the N content reaches 1.0%.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Nanoscience & Nanotechnology
X. W. Li, Y. Ruan, C. H. Sun, M. H. Yang, B. Wei
Summary: The peri-eutectic transition L+6-Fe ->gamma-Fe(Ni)+Fe2Ti in ternary Fe66.5Ni17.6Ti15.9 alloy was investigated using directional solidification technique. The primary phase and peri-eutectic had a common orientation relationship, while the eutectic had multiple orientation relationships. This study provided evidence for different growth mechanisms and clarified the nucleation and growth of the peri-eutectic phase.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Na Yan, Delu Geng, Bingbo Wei
Summary: The influence of cooling rate on the damping performance and martensitic transformation mechanism of Fe-17%Mn alloy was investigated. It was found that rapid solidification was beneficial for the formation of ε-martensite and the improvement of damping capacity.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Zachary D. Harris, Kateryna Guiseva, John R. Scully, James T. Burns
Summary: The hydrogen environment-assisted cracking behavior of the MP98T alloy for marine fastener applications was evaluated in 0.6 M NaCl solution. Results showed that MP98T is resistant to HEAC at cathodic protection potentials and has reduced efficacy for hydrogen uptake compared to Monel K-500 under hydrogen overpotentials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Samad Firdosy, Nicholas Ury, Katherine Dang, Pablo Narvaez, Ronald Witt, Joshua Berman, Joelle Cooperrider, Robert Peter Dillon, Vilupanur A. A. Ravi
Summary: This article explores the use of additive manufacturing technology to design, build, and test complex magnetic shields. Fe-79.7Ni-4.1Mo alloy is successfully additively manufactured and shows good magnetic permeability and saturation. Magnetic hysteresis testing and microstructural characterization are conducted to evaluate the magnetic shield effectiveness of different prototype designs.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jordan Roger Kozakevich, Joshua Stroh, Dimitry Sediako, David Weiss
Summary: Heat-treated aluminum-silicon (Al-Si)-based alloys have been the dominant choice for cast lightweight alloys, but Al-Ce-based alloys are showing promise as a replacement due to their elimination of costly heat treatments. This study characterizes the solidification of an Al-Ce alloy with Ni and Mn additions, revealing the presence of different phases at different cooling rates. The findings suggest that Al-Ce-Ni-Mn alloys have potential in industrial applications.
Article
Materials Science, Multidisciplinary
Fei Sun, Goro Miyamoto, Yikun Liu, Yuichiro Hayasaka, Tadashi Furuhara
Summary: This study investigates the phase separation and ordering phenomena during aging of Fe-35Ni-35Mn medium-entropy alloy using advanced characterization techniques. The results reveal that phase separation is induced by Mn clustering in the early stage of aging. A statistical thermodynamic model suggests that nucleation of the L1(0) phase should precede phase separation at 500 degrees C, while phase separation is possible in a disordered state at 400 degrees C and ordering further enhances it.
Article
Chemistry, Physical
Weiling Wang, Zhijiang An, Sen Luo, Miaoyong Zhu
Summary: In this study, the peritectic solidification process and microstructure characteristics of medium manganese steel were investigated at different cooling rates. It was found that at low cooling rate, the initial delta-Fe phase exhibited a cellular structure. On the other hand, at higher cooling rates, a massive-like transformation occurred, leading to the formation of multiple gamma-Fe grains within a single delta-Fe grain. The migration rate of the delta/gamma interface was inversely proportional to the cooling rate, and the occurrence of the massive-like transformation greatly promoted the peritectic transformation. Dendrite etching experiments confirmed that higher cooling rates resulted in finer solidification structures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Liqiu Yong, Yang Zuo, Lixin Sun, Huabei Peng, Xuguang An, Hui Wang, Yuhua Wen
Summary: Mo alloying does not effectively inhibit the precipitation of B2 nano-particles in Fe-Mn-Al-Ni shape memory alloys during natural aging, and the cooling rates have an impact on the sizes and misfits of the B2 nano-particles.
Article
Nanoscience & Nanotechnology
Xiao Liu, Cheng Zhang, Chaoyi Zhu, Kenneth Vecchio
Summary: This study reports the achievement of strength-ductility synergy in an Al-Cr-Fe-Co-Ni complex concentrated alloy through the utilization of a heterogeneous lamella structure. The materials were processed using a simple two-step thermo-mechanical processing route and showed significant enhancement in both strength and ductility. The mechanical properties can be tuned by changing the annealing time, and the multiphase lamella structure exhibits a stronger Bauschinger effect compared to other similar materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Jing Xue, Rong Hu, Guanghai Bai, Jinna Mei, Fei Xue, Gang Sha
Summary: The study reveals that the formation of Mn-Ni clusters in Fe-Mn-Ni steel during irradiation at different temperatures leads to significant variations in their composition, with clusters exhibiting different hardening effects depending on their chemistry.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Coatings & Films
Jijie Yang, Chenglei Wang, Laichang Zhang, Zhijun Wang, Mulin Liang, Chong Liu, Weijie Liu, Xin Li, Shengfeng Zhou, Hong Tan
Summary: The objective of this study is to develop a new type of high-entropy alloy (HEA) coating with high temperature oxidation resistance. The Fe-Ni-Cr-Co-Mo-W HEA coatings were prepared by plasma surface alloying technology with different holding temperatures and their microstructure morphology evolution and properties were systematically studied. The results showed that the coatings had a gradient structure, excellent metallurgical bonding, and improved resistance to abrasion and high temperature oxidation.
SURFACE & COATINGS TECHNOLOGY
(2023)
