Article
Chemistry, Physical
Jinlong Su, Xiankun Ji, Haiming Xie, Jie Tang, Fulin Jiang, Dingfa Fu, Jie Teng, Hui Zhang
Summary: The flow behaviors and microstructural evolutions during multi-stage hot deformation of a near-alpha Ti-5Al-2.5Sn alloy were studied. It was observed that the flow stress and restoration fraction in the alpha + beta phase region were lower in the non-isothermal multi-stage deformation compared to isothermal multi-stage deformation. Clear transitions were observed between different phase regions during the non-isothermal multi-stage deformation. Additionally, a dynamic phase transformation and the formation of FCC-Ti precipitations were observed during deformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Solomon Kerealme Yeshanew, Chunguang Bai, Qing Jia, Tong Xi, Zhiqiang Zhang, Diaofeng Li, Zhizhou Xia, Rui Yang, Ke Yang
Summary: The hot workability behavior of antibacterial Ti6Al4V-5Cu alloy was investigated, and the relationship between deformed microstructures and deformation parameters was established. The alloy's deformation was influenced by temperature and strain rate, with both work hardening and flow softening observed.
Article
Materials Science, Multidisciplinary
O. Sitdikov, E. Avtokratova, M. Markushev
Summary: The study revealed that the grain refinement of Al-Mg-based alloy during multidirectional isothermal forging occurs through continuous dynamic recrystallization controlled by nanosized precipitates, resulting in the formation of (ultra) fine grain structure.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Ruyue You, Mengmeng Zhang, Jianke Qiu, Chao Fang, Chunling Zhao, Bo Lu, Haibin Ji, Yingjie Ma, Jiafeng Lei, Rui Yang
Summary: This study investigates the effects of dwell period and microstructural conditions on dwell sensitivity in titanium components of gas turbine engines. The results show that dwell time and crystal orientation distribution have significant influences on dwell sensitivity, with a saturation point reached at 120 seconds. Extending the dwell time further increases dwell sensitivity in locations with low sensitivity.
Article
Engineering, Aerospace
Can LI, Imran Sardar Muhammad, Lihui Lang, Yingjian Guo, Xiaoxing LI, Sergei Alexandrova, Dexin Zhang
Summary: Two-stage diffusion bonding was performed on micro-duplex TC4 titanium alloy to investigate the flow behavior and constitutive models of the bonding joint and base metal after thermal cycling. The joint exhibited weak dynamic recovery at certain strain rates and temperatures, while steady-state characteristics were observed at other conditions. The deformation conditions resulted in significant differences in dynamic softening performance between the joint and base metal, but similar behavior was observed in the elastic and strain hardening stages. Strain-compensated Arrhenius-type constitutive models were developed for the joint and base metal, showing good correlation with low average absolute relative error values.
CHINESE JOURNAL OF AERONAUTICS
(2023)
Article
Chemistry, Physical
RuZhao Chen, Bin Fu, Hu Zhang, Jie Hu, Xu Yang, LianQi Zhang
Summary: This study proposes a method of accelerating phase formation of magnetic refrigerants through cold compression plastic deformation at room temperature. The grain structure, phase composition, and magneto-thermal effects of LaFe(13.1)Co(0.7)Si(1.4) alloy were systematically studied. The results show that pre-compressed samples have increased proportion of magnetothermal phase and exhibit significant magnetic entropy changes, making them attractive candidates for room temperature and high-temperature magnetic refrigeration applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Jinwoo Lee, Hyuk Jong Bong, Daeyong Kim, Jinjin Ha
Summary: In this study, the mechanical responses and ductile damage behavior of Ti-6Al-4V alloy sheets at high temperature were investigated through experiments and numerical simulations. The improvement in formability at high temperature was also evaluated.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Bingnan Qian, Srinivas Aditya Mantri, Sriswaroop Dasari, Jinyong Zhang, Lola Lilensten, Fan Sun, Philippe Vermaut, Rajarshi Banerjee, Frederic Prima
Summary: The work proposes a novel strategy to enhance the strength while preserving good ductility in the TRIP/TWIP Ti-12Mo alloy by coupling omega(iso) formation and mechanical twinning/martensitic transformation. After aging at 200 degrees C for 60s, an unprecedented combination of tensile properties is recorded, with a yield stress of 865MPa (80% higher than classic Ti-12Mo) and a uniform elongation of 0.35. Higher yielding stress (990MPa) is achieved with an increased aging duration of 150s, where mechanical twinning is still active.
Article
Materials Science, Multidisciplinary
Yi Yang, Bohua Zhang, Zhichao Meng, Lei Qu, Hao Wang, Sheng Cao, Jianan Hu, Hao Chen, Songquan Wu, Dehai Ping, Geping Li, Lai-Chang Zhang, Rui Yang, Aijun Huang
Summary: The study examines the impact of twinning transfer behavior on the twin shape in a beta-type Ti-23.1Nb-2.0Zr-1.0O Ti alloy, finding that the crystallographic alignment factor and misorientation angle of grain pairs play a crucial role. The occurrence or non-occurrence of twinning transfer determines whether the twins have a ruler shape or a lenticular shape, providing effective mechanisms to reduce stress concentration.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
J. C. Guia-Tello, C. G. Garay-Reyes, M. A. Ruiz-Esparza-Rodriguez, L. J. Garcia-Hernandez, J. Aguilar Santillan, I Estrada-Guel, R. Martinez-Sanchez
Summary: The study found that plastic deformation affects the kinetic control and reaction sequence of phase precipitation in 2024 aluminum alloy, leading to two different Avrami exponent values.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Engineering, Mechanical
Hao Wu, Meng Huang, Xuewen Li, Yiping Xia, Zhi Wang, Guohua Fan
Summary: The study proposed a new heterogeneous laminated/gradient integrated strategy to improve material performance. Results demonstrated that the stress-bearing constituents gradually transition from Ti(Al) to TiBw/Ti layers as the temperature decreases, leading to temperature-dependent reversed fracture behavior.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Chemistry, Physical
G. Sukumar, B. Bhav Singh, I. Balasundar, Amit Bhattacharjee, V. Subramanya Sarma
Summary: The hot deformation characteristics of Ti-4Al-2.5V-1.5Fe-0.25O alloy in different conditions were studied through isothermal hot compression tests. Various methods such as strain rate sensitivity, kinetic analysis, and microstructural characterization were used to understand the deformation behavior and identify the optimal regime for primary breakdown. The results showed different deformation mechanisms in the beta and alpha + beta fields at different strain rates, and the optimal thermomechanical processing conditions were determined through a combination of strain rate sensitivity map and microstructural analysis. Constitutive equations were also developed to predict the flow stress values in different fields.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Ilusca Soares Janeiro, Jean-Michel Franchet, Jonathan Cormier, Nathalie Bozzolo
Summary: Hot compression and creep tests were conducted on a polycrystalline nickel-base superalloy to investigate the mechanisms of gamma ' precipitation during deformation. The results showed that the fraction of gamma '-phase increased after hot compression, indicating a dynamic precipitation process. Two new populations of precipitates formed during deformation were identified. The fraction of gamma '-phase produced during deformation increased with increasing deformation magnitude, decreasing deformation temperature, and slower strain rates. A scenario for dynamic gamma ' precipitate nucleation and growth was proposed to explain the experimental observations and the influence of dislocation density.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
S. Pilz, A. Hariharan, F. Guenther, M. Zimmermann, A. Gebert
Summary: This study reveals the influence of omega iso precipitates on the deformation mechanisms and mechanical properties of a biomedical beta-type Ti-40Nb alloy. The results show that the fraction and size of omega iso increased with increasing aging time, leading to an increase in Young's modulus and proof stress. The active deformation mechanisms also changed with aging time, resulting in significant alterations in mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yongju Kim, Hyung Keun Park, Peyman Asghari-Rad, Jaimyun Jung, Jongun Moon, Hyoung Seop Kim
Summary: The constitutive modeling of CoCrFeMnNi high-entropy alloy at cryogenic and room temperatures has been investigated, showing enhanced ductility and strength at 77K due to the combination of sub-grain structure, twinning, and dislocations. A kinematic constitutive model with a critical twinning stress parameter was constructed to explain the twinning initiation criteria, showing good agreement with experimental data. Different modeling parameters were obtained for each temperature to account for the changing deformation behavior.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Farahnaz Haftlang, Abbas Zarei-Hanzaki, Hamid Reza Abedi, Joraslov Malek, Ehsan Farabi, Hossein Beladi
METALS AND MATERIALS INTERNATIONAL
(2020)
Article
Materials Science, Multidisciplinary
Hossein Beladi, Alireza Ghaderi, Gregory S. Rohrer
PHILOSOPHICAL MAGAZINE
(2020)
Article
Materials Science, Multidisciplinary
N. Haghdadi, P. Cizek, P. D. Hodgson, Y. He, B. Sun, J. J. Jonas, G. S. Rohrer, H. Beladi
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Metallurgy & Metallurgical Engineering
Pawan Kumar, Peter Hodgson, Hossein Beladi, Mamookho Elizabeth Makhatha, Aniket Kumar Dutt
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2020)
Article
Nanoscience & Nanotechnology
Dong Han, Hua Ding, Degang Liu, Bernard Rolfe, Hossein Beladi
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Materials Science, Multidisciplinary
Ehsan Farabi, Vahid Tari, Peter D. Hodgson, Gregory S. Rohrer, Hossein Beladi
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Multidisciplinary Sciences
Qiuliang Huang, Ran Shi, Ondrej Muransky, Hossein Beladi, Saurabh Kabra, Christian Schimpf, Olena Volkova, Horst Biermann, Javad Mola
SCIENTIFIC REPORTS
(2020)
Correction
Multidisciplinary Sciences
Qiuliang Huang, Ran Shi, Ondrej Muransky, Hossein Beladi, Saurabh Kabra, Christian Schimpf, Olena Volkova, Horst Biermann, Javad Mola
SCIENTIFIC REPORTS
(2020)
Article
Nanoscience & Nanotechnology
Jiangting Wang, Hossein Beladi, Libo Pan, Fang Fang, Jun Hu, Lingxue Kong, Peter D. Hodgson, Ilana Timokhina
Summary: This study successfully used continuous cooling process to achieve interphase precipitation-strengthened ferrite in dual-phase steels, with nano-sized (Ti, Mo) C interphase precipitates forming hardened ferrite phase, providing a new strategy for dual-phase steel production.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Mechanical
Paul M. Souza, Giribaskar Sivaswamy, Liza Hall, Salaheddin Rahimi
Summary: A constitutive model was developed to predict the high temperature sub-transus flow behavior of a metastable beta Ti-10V-2Fe-3Al alloy, and its applicability for industrial scale forging process has been evaluated using a finite element simulation. The model, based on Estrin Mecking and Avrami methods, successfully predicted the deformation behavior of the alloy and was validated during industrial scale forging processes.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Prashant Pathak, Ilana Timokhina, Subrata Mukherjee, Gregory S. Rohrer, Hossein Beladi
Summary: The crystallographic properties of interfaces in dual-phase steel were investigated, showing that the distribution of interfaces was influenced by the dominant phase transformation mechanism, leading to anisotropic grain boundary plane distribution.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Paul M. Souza, Giribaskar Sivaswamy, Aurik Andreu, Salaheddin Rahimi
Summary: Secondary hot-working is crucial for microstructural modification of dual phase titanium alloys to tailor mechanical properties. However, industrial scale manufacturing often poses challenges due to a narrow processing window. Cyclic thermal treatment (CTT) is emerging as a potential technology for microstructure modification in Ti-6Al-4V, reducing mechanical work in the alpha + beta region. This study summarizes the CTT investigations conducted on wrought Ti-6Al-4V alloy to develop different initial microstructures and incorporates a JMAK model into DEFORM (R) software for microstructure evolution prediction.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Ahmad Mirzaei, Razieh Ghaderi, Peter D. Hodgson, Xiang Ma, Gregory S. Rohrer, Hossein Beladi
Summary: The influence of parent austenite deformation state on lath martensitic microstructure was examined in this study, revealing significant changes in boundary network connectivity and distribution. Manipulating the intervariant boundary network of lath martensite through changes in parent austenite deformation state can enhance key final product properties.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Paul M. Souza, Giribaskar Sivaswamy, Luke Bradley, Andrew Barrow, Salaheddin Rahimi
Summary: In this study, the isothermal hot compression tests were conducted on Inconel 625 nickel alloy to examine its deformation behavior. The results revealed the stages of work-hardening, dynamic recovery, and flow softening, with discontinuous dynamic recrystallization as the dominant recrystallization mechanism. A material's constitutive model was developed to predict the flow behavior and integrated into finite element simulation, which showed good convergence with experimental data.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Ehsan Farabi, Vahid Tari, Peter D. Hodgson, Gregory S. Rohrer, Hossein Beladi
MATERIALS CHARACTERIZATION
(2020)