Article
Materials Science, Multidisciplinary
Hao Li, Kuishan Sun, Xianglong Meng, Wei Cai, Liancheng Zhao
Summary: Recently, the isothermal martensitic transformation in shape memory alloys (SMAs) has been investigated, but the underlying mechanisms are still not fully understood. In this study, the isothermal transition from B2 to B19 was confirmed in Ti-Ni-Cu-Co melt-spun ribbons. A thermally activated kinetic model was developed to characterize the kinetics and it agreed well with the experimental results. It was found that the nucleation density and activation energy played important roles in the isothermal transition.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Tatsuya Ito, Xiao Xu, Atsushi Miyake, Yuto Kinoshita, Makoto Nagasako, Kohki Takahashi, Toshihiro Omori, Masashi Tokunaga, Ryosuke Kainuma
Summary: In this paper, a new Pd2MnGa Heusler-type MMSMA with an extremely small dissipation energy and hysteresis is reported. The microstructures, crystal structures, magnetic properties, martensitic transformations, and magnetic-field-induced strain of aged Pd2MnGa alloys are investigated. The low values of dissipation energy and hysteresis make the Pd2MnGa alloy a promising candidate for high-efficiency MMSMAs.
Review
Materials Science, Multidisciplinary
Adelaide Nespoli, Davide Ninarello, Carlo Fanciulli
Summary: Shape memory alloys (SMA) exhibit shape memory and pseudoelastic properties due to a thermoelastic phase transition between austenite and martensite. This work focuses on cryogenic SMAs, which undergo phase transition at temperatures below freezing point. Despite the challenges in conducting experiments at very low temperatures, these materials are important for extreme environments like space. Cu-based systems, particularly the Cu-8.8Al-13.1Mn (wt.%) alloy, have the lowest measured phase transformation temperatures.
Article
Materials Science, Multidisciplinary
Sina Hossein Zadeh, Amir Behbahanian, John Broucek, Mingzhou Fan, Guillermo Vazquez, Mohammad Noroozi, William Trehern, Xiaoning Qian, Ibrahim Karaman, Raymundo Arroyave
Summary: In this study, a predictive model for transformation temperatures in shape memory alloys is developed by incorporating appropriate feature engineering and selecting a suitable Machine Learning algorithm. The gradient boosting ML surrogate model achieves an average accuracy of over 95% in predicting various transformation temperatures. The inclusion of heat treatment, rolling, extrusion processing parameters, and alloy system categorical features in the model input features improves the accuracy and realism of the results.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Y. Chen, M. Klinger, J. Duchon, P. Sittner
Summary: The study investigates the stress deformation and high temperature heating process of NiTi shape memory wire through martensitic transformation at low temperature. It is found that plastic deformation involving dislocation slip and twinning triggers the metal structure transformation in martensite, and the impact on functionality in engineering applications is discussed.
Article
Chemistry, Physical
Yuki Ikeda, Masahiko Nishijima, Takanori Kiguchi, Toyohiko J. Konno
Summary: The crystal structure of martensite in Cu-27at.%Zn-9.0 at.%Al alloy was studied using HAADF-STEM and GPA, revealing changes in atomic rearrangements during martensitic transformation. The coherent interface between the phases with a slight tilt in the basal plane was also observed.
Article
Materials Science, Multidisciplinary
Zhen Chen, Daoyong Cong, Yang Ren, Yin Zhang, Haile Yan, Li You, Chao Song, Shaohui Li, Yuxian Cao, Shengwei Li, Changchang Zuo, Li Wang, Zhiyong Gao, Wei Cai, Yandong Wang
Summary: In this study, a high-performance, cost-effective high-temperature shape memory microwire with exceptional superelasticity, one-way and two-way shape memory effects has been developed using the strategy of creating an oligocrystalline structure. This microwire shows great potential for high-temperature actuation, sensing, and energy conversion applications.
NPG ASIA MATERIALS
(2022)
Article
Chemistry, Physical
Hao-Chen Lee, Jia-Jyun Shen, Yen-Ting Chang, Cheng-Tien Wu, Chih-Hsuan Chen
Summary: The investigation showed that Ti49.2Ni49.3Fe1.5 alloy aged at 400 degrees C for 150 h exhibited the largest recoverable strain in superelasticity and retained the largest cooling effect after 1000 deformation cycles. The linear superelasticity exhibited a low slope of the Clausius-Clapeyron relation of about 0.5 MPa/degrees C, allowing the alloys to exhibit super-elasticity and the elastocaloric effect over a wider temperature range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
J. Makkar, B. Young, I Karaman, T. Baxevanis
Summary: Materials with irreversible deformation show increasing resistance to crack advance, known as stable crack growth. Experimental observations indicate that crack advance-induced toughness enhancement in hysteretic materials could be reversed by partial unloading, impacting the evaluation of the resistance curve. Additionally, the study provides experimental verification of theoretical insights into the mechanics of stable crack growth.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Wanyuan Gui, Yuhai Qu, Yuxian Cao, Yunzhi Zhao, Chenxu Liu, Qing Zhou, Jie Chen, Yahui Liu
Summary: This study investigates the effect of Tb substitution for Ni on the properties of Ni-Mn-Sn alloys. The results show that increasing Tb content can enhance the martensitic transformation temperature, mechanical properties, and cyclic stability of elastocaloric effect in the alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Yanqing Zhang, Shuiyuan Yang, Laisen Wang, Shaobin Pan, Jinbin Zhang, Xingjun Liu, Cuiping Wang
Summary: This paper reports the superelasticity and excellent cycle stability of boron-microalloyed Co-V-Al-Fe shape memory alloy. The addition of boron results in refined grain size and improved mechanical and superelastic properties in the alloy.
Article
Nanoscience & Nanotechnology
Junyu Chen, Liping Lei, Gang Fang, Dongwei Wang
Summary: This study investigates the grain size dependence of the elastocaloric effect of NiTi and finds a suitable grain size that yields good cooling properties. The grain size has different effects on various refrigeration metrics, such as adiabatic temperature variation, isothermal entropy change, energy dissipation, cyclic stability, and working temperature span. The 30 nm grain size specimen demonstrates excellent comprehensive performance and repeatability, making it a promising elastocaloric refrigerant candidate.
MATERIALS TODAY NANO
(2023)
Article
Thermodynamics
Hao Sun, Yu Zhang, Qin Pan, Yu Liu, Weisen Zheng, Xiao-Gang Lu
Summary: In this study, a thermodynamic reassessment of the Ni-Ti-Cr ternary system was conducted using the CALPHAD method. The B19' phase was successfully introduced into the system description, and the martensitic transformation starting temperatures of Ni-Ti and Ni-Ti-Cr alloys were accurately predicted.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Shivam Tripathi, Karthik Guda Vishnu, Michael S. Titus, Alejandro Strachan
Summary: In this study, the role of coherent nanoscale B2 Ni50Al50 precipitates on the temperature- and stress-induced martensitic phase transformation in nanocrystalline Ni63Al37 shape memory alloys was characterized using multimillion-atoms molecular dynamics simulations. The simulations revealed that the presence of precipitates significantly improved the reversibility of the transformation and stabilized the stress-strain response.
Article
Materials Science, Multidisciplinary
Hamed Shahmir, Fatemeh Kiani, Sadjad Baradari, Natalia Resnina, Rashid Bikbaev
Summary: The addition of Zr can suppress the martensitic phase transformation of NiTi alloys, leading to a significant increase in hardness and exhibiting pseudoelasticity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Eugenio Riccardo Pinatel, Mauro Palumbo, Francesco Massimino, Paola Rizzi, Marcello Baricco
Article
Materials Science, Multidisciplinary
A. Breidi, S. G. Fries, M. Palumbo, A. V. Ruban
COMPUTATIONAL MATERIALS SCIENCE
(2016)
Article
Materials Science, Multidisciplinary
Bo Sundman, Ursula R. Kattner, Christophe Sigli, Matthias Stratmann, Romain Le Tellier, Mauro Palumbo, Suzana G. Fries
COMPUTATIONAL MATERIALS SCIENCE
(2016)
Article
Physics, Condensed Matter
Mauro Palumbo, Andrea Dal Corso
JOURNAL OF PHYSICS-CONDENSED MATTER
(2017)
Article
Physics, Condensed Matter
Mauro Palumbo, Andrea Dal Corso
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2017)
Article
Thermodynamics
Peisheng Wang, Joerg Kossmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2019)
Article
Materials Science, Multidisciplinary
Silvana Tumminello, Mauro Palumbo, Jorg Kossmann, Thomas Hammerschmidt, Paula R. Alonso, Silvana Sommadossi, Suzana G. Fries
Article
Chemistry, Physical
Francesco Aversano, Mauro Palumbo, Alberto Ferrario, Stefano Boldrini, Carlo Fanciulli, Marcello Baricco, Alberto Castellero
Article
Materials Science, Multidisciplinary
Federico Scaglione, Sergio Arnaboldi, Cristian Viscardi, Marcello Baricco, Mauro Palumbo
Summary: This paper reports two case studies where solidification processes were successfully investigated using CALPHAD-based methodologies. The first case involves the use of thermodynamic databases to describe the solidification processes of a precious Au-base alloy containing Ir as a grain refiner. The second case involves the development and use of a quaternary database for Al-Mg-Si-Er alloys for additive manufacturing.
Article
Chemistry, Physical
Alessandro Difalco, Gabriele Barrera, Mauro Palumbo, Alberto Castellero, Marcello Baricco, Paola Maria Tiberto, Paolo Allia
Summary: This study investigates the magnetic and electronic properties of Co2ZrSn and Co2HfSn Heusler alloys through a combination of experimental and ab-initio investigations. The experimental results indicate that both alloys exhibit different ferromagnetic properties at different temperatures, transitioning from localized ferromagnetism to weak itinerant ferromagnetism. Ab-initio calculations show the presence of a half-metallic band gap in both compounds. The magnetic moments and band gap width are found to depend on the cell parameters.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Mauro Palumbo, Kazuaki Kisu, Valerio Gulino, Carlo Nervi, Lorenzo Maschio, Silvia Casassa, Shin-ichi Orimo, Marcello Baricco
Summary: This study investigates a metal borohydride ammonia borane complex as an electrolyte for magnesium-based batteries. The compound's characteristics are characterized using theoretical methods, and the migration of magnesium ions is analyzed. The results show that the activation energy for ion migration in solid-state electrolytes can be reliably estimated using DFT-based methods.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Deepti Raj, Mauro Palumbo, Gianluca Fiore, Federica Celegato, Federico Scaglione, Paola Rizzi
Summary: A low-cost Nanoporous Gold (NPG) was successfully produced by chemical dealloying of supersaturated solid solution Au33Fe67 ribbons. The obtained NPG, with tunable ligament size and shape, showed impressive Surface-Enhanced Raman Scattering (SERS) effect and a detection limit as low as 10-15 M. It also exhibited great potential as an economical and highly sensitive SERS-active substrate for life science applications. The production process of NPG was inexpensive and sustainable.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Valerio Gulino, Anna Wolczyk, Andrey A. Golov, Roman A. Eremin, Mauro Palumbo, Carlo Nervi, Vladislav A. Blatov, Davide M. Proserpio, Marcello Baricco
INORGANIC CHEMISTRY FRONTIERS
(2020)
Article
Materials Science, Multidisciplinary
D. Naujoks, Y. M. Eggeler, P. Hallensleben, J. Frenzel, S. G. Fries, M. Palumbo, J. Kossmann, T. Hammerschmidt, J. Pfetzing-Micklich, G. Eggeler, E. Spiecker, R. Drautz, A. Ludwig
Review
Engineering, Manufacturing
Bo Sundman, Ursula R. Kattner, Mauro Palumbo, Suzana G. Fries
INTEGRATING MATERIALS AND MANUFACTURING INNOVATION
(2015)