Review
Materials Science, Multidisciplinary
Abdul Malik, Umer Masood Chaudry, Kotiba Hamad, Tea-Sung Jun
Summary: This study reviews the microstructure features that affect superplasticity of Mg alloys, as well as the deformation behavior under different conditions and dominant deformation mechanisms.Various studies were compared to identify optimal strain rate and temperature for achieving excellent high strain rate superplasticity.
Article
Food Science & Technology
Bing Cui, Wenxin Chen, Hongshan Liang, Jing Li, Di Wu, Shuxin Ye, Bin Li
Summary: The introduction of gellan gum (GG) and/or Ca2+ in the kappa-carrageenan/konjac gum (KC/KGM) mixed gel system can enhance its mechanical and thermal properties, ensuring consistent performance before and after heating. Adjusting the mass ratio of KC and KGM can also result in thermo-irreversible gels with different texture properties, enriching the design of novel gel-based food ingredients.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Denise C. Machado, Paula Cibely Alves Flausino, Yi Huang, Paulo Roberto Cetlin, Terence G. Langdon, Pedro Henrique R. Pereira
Summary: Experiments were conducted to assess the effect of processing temperature on the hardness evolution, microstructure and the flow properties of an annealed Al-3Mg alloy processed by high-pressure torsion (HPT) at either 300 or 450 K. The results show that HPT processing at room temperature (RT) leads to higher microhardness values and a more uniform hardness distribution compared to processing at 450 K. The metal processed at RT exhibits enhanced strength and superplastic flow during deformation at 523 K, while the alloy processed at 450 K shows limited elongation due to abnormal grain coarsening.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Srikant Gollapudi, Nikhil Rai, Rajan Kushwaha, Rama Krushna Sabat
Summary: This study investigates the influence of crystallographic texture on the total amount of solute segregated at grain boundaries and weighted grain boundary energy of nanocrystalline materials. The findings show that nanostructures with random texture have higher values of X-gb,X-tot and gamma(w) compared to those with {111} < 110 > texture, which has implications for the development of thermally stable nanocrystalline materials. The effect of texture is further discussed through a case study on the Ni-W system using the nanocrystalline stability criterion proposed by Kalidindi and Schuh.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
S. M. Fatemi, H. Paul, A. Hemmati-Hosuri
Summary: An ultrafine-grained AZ31 Mg alloy processed through multipass equal channel angular pressing (ECAP) achieved mean grain sizes of 5 and 0.9 μm after two and four passes, respectively. Tensile testing at high temperatures revealed that the four-pass-processed alloy exhibited a superplastic elongation of 410% at 250 degrees C. The deformation behavior was studied using the Haehner criterion, showing that grain boundary sliding was the rate-controlling mechanism with a strain rate sensitivity of 0.38. The contribution of slip system to superplasticity was discussed using Schmid factors, which showed that slip activity prevalence at high strains induced texture-strengthening effect and low-angle grain boundary formation.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Review
Engineering, Civil
Reza Motallebi, Zeinab Savaedi, Hamed Mirzadeh
Summary: High-entropy alloys (HEAs) are a new class of engineering materials with unique mechanical and functional properties. Superplastic forming of HEAs might be a viable route for actual applications of these alloys. This monograph summarized the superplastic behaviors of HEAs and medium-entropy alloys (MEAs), along with reviewing the basics of high-entropy alloys and fine-grained superplasticity.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Yang Liu, Zhiqiang Li, Bing Zhao, Chaoyang Sun, Yinghao Feng
Summary: The superplastic microstructure evolution and deformation behavior of rolled near-alpha TA32 titanium alloy were investigated. The alloy exhibited exceptional superplastic deformability with maximum elongation near 900% and flow stress sensitivity to temperature and strain rate. The flow softening process was mainly controlled by continuous dynamic recrystallization (CDRX) and dynamic recovery (DRV) mechanisms. The main deformation mechanism was the relative sliding of grains along high-angle grain boundaries (HAGBs) coordinated by dislocation motion, grain rotation, and dynamic recrystallization (DRX).
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Polymer Science
Seul-Yi Lee, Min-Joo Kang, Seong-Hwang Kim, Kyong Yop Rhee, Jong-Hoon Lee, Soo-Jin Park
Summary: The study found that the addition of PEI significantly enhances the thermal stability and mechanical properties of epoxy resins, and the formation of semi-interpenetrating polymer networks (semi-IPNs) helps improve flexural strength and fracture toughness.
Article
Chemistry, Physical
Ning Tian, Wenjun Ye, Xiaoyun Song, Songxiao Hui
Summary: The SP700 titanium alloy exhibited excellent superplasticity with fine grain size and increased volume fraction of the beta phase as strain increased. The beta-stabilizing elements were mainly dissolved within the beta phase and diffused from alpha to beta phase during deformation. The increase in strain led to the accumulation of dislocations and an increase in the proportion of low angle grain boundaries.
Article
Engineering, Multidisciplinary
Peikun Qiu, Jianwen Le, Yuanfei Han, Yue Chen, Guangfa Huang, Jianwei Mao, Liming Lei, Weijie Lu
Summary: Superplastic forming is a promising technique for producing complex-shaped components of hard-to-deform titanium matrix composites. The effects of matrix microstructural characteristics and whisker orientation on superplastic deformation behavior were investigated. The results showed that these factors have a significant impact on the deformation behavior.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Ning Tian, Xiaoyun Song, Wenjun Ye, Songxiao Hui
Summary: The deformation mechanisms of a beta-rich alpha+beta titanium alloy were studied through superplastic tensile tests at different temperatures and strain rates. The alloy exhibited excellent superplasticity at 760 degrees C and 1 x 10(-3) s(-1), with a high fracture elongation and strain rate sensitivity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Mechanical
Bin Chen, Quanlin Zhou
Summary: Thermal fracturing is a common phenomenon in engineering and natural processes caused by significant cooling or heating. This study investigates all processes of thermal fracturing in an unconfined half-space plane using a plane strain model, developing a dimensionless solution to predict the evolution of fracture length, spacing, and pattern accurately and rapidly for thermal shock problems. The new stability criterion introduced accounts for fracture reactivation and permanent arrest, providing a stricter approach than existing models.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Chemistry, Physical
Dongsheng Xie, Hucheng Pan, Zhen Pan, Dongdong Zhang, Weineng Tang, Chubin Yang, Hongbo Xie, Yuping Ren, Gaowu Qin
Summary: In this work, a high heat resistance is achieved by adding a small amount of cerium to a magnesium alloy, which exhibits a high ultimate tensile strength of approximately 181 MPa at 250 degrees C. The high-temperature strength can be attributed to the suppressed re-crystallization process due to the addition of cerium, which effectively prevents grain boundary sliding and promotes texture hardening. Moreover, the alloy shows excellent thermal stability during long-term heating, with the high temperature strength remaining above 145 MPa after annealing at 300 degrees C for 6 hours.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Linlin Fu, Gaohui Wu, Chang Zhou, Ziyang Xiu, Wenshu Yang, Jing Qiao
Summary: This research investigates the impact of extruded pure aluminum texture on dimensional stability, revealing that increasing annealing temperature leads to changes in grain orientation and recrystallized grains, affecting the material's residual plastic strain. Additionally, a higher fraction of grains with crystallographic orientation at higher annealing temperatures contributes to the formation of fine equiaxed grains, impacting the material's overall texture and dimensional stability during thermal cycling.
Article
Materials Science, Multidisciplinary
Hailong Jia, Yinan Piao, Kaining Zhu, Chaoran Yin, Wenqiang Zhou, Feng Li, Min Zha
Summary: This study aimed to enhance the thermal stability of ultrafine Al grains produced by ECAP via dynamic precipitation. It was found that nanoscale Zn particles have a positive effect on preserving ultrafine grains during annealing, which is useful for designing UFG Al alloys with improved thermal stability.
