Article
Materials Science, Multidisciplinary
Xinyu Yang, Richard A. Barrett, Noel M. Harrison, Sean B. Leen
Summary: A physically-based, mixed-phase structure-property model is developed for analyzing the microstructure-sensitivity of tensile stress-strain response in additively manufactured Ti-6Al-4V, considering the effects of solutes, grain size, phase volume fraction, and dislocation density. The model incorporates solid-state phase transformation and dislocation density evolution to simulate the effects of martensite dissolution and a -b transformation at high temperature, allowing for rapid process-structure-property prediction and optimization.
MATERIALS & DESIGN
(2021)
Article
Chemistry, Physical
Yujian Wang, Junjie Li, Jianwei Li, Lei Zhang, Jiankai Ma, Zhijun Wang, Feng He, Jincheng Wang
Summary: Coarsening of the basketweave alpha + beta microstructure in Ti-6Al-4V during thermal cycling is driven by multiple dissolution and precipitation transformations instead of conventional Ostwald ripening. This study reveals that the vanishing of alpha plates continues during repeated thermal cycling through two mechanisms, which are related to the Gibbs-Thomson effect. The influence of cycling frequency and total duration on the coarsening transformation is also detected. Long cycling duration leads to severe coarsening, while the final coarsening of alpha plates is almost independent of the cycling frequency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Feiyu Xiong, Chenyang Huang, Orion L. Kafka, Yanping Lian, Wentao Yan, Mingji Chen, Daining Fang
Summary: An integrated modeling framework involving discrete element method, finite volume method, and extended cellular automaton method is proposed to study grain growth and microstructure evolution in powder bed fusion additive manufacturing. The simulation results are qualitatively consistent with experimental observations, demonstrating the effectiveness of the modeling framework in understanding and controlling microstructural development.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Jinlong Su, Fulin Jiang, Junjie Li, Chaolin Tan, Zili Xu, Haiming Xie, Jin Liu, Jie Tang, Dingfa Fu, Hui Zhang, Jie Teng
Summary: Understanding the phase transformation behaviors and microstructural evolutions during post-heat treatments is crucial for improving the mechanical performances of additively manufactured titanium alloys. This study investigates the effects of distinctive dual-stage heat treatments on the Ti-6Al-4V alloy and demonstrates that the combination of dual-stage heat treatments and salt bath quenching is an effective approach for obtaining fine microstructures and optimized strength and ductility. The study also discusses the influence of phase transformation behaviors and dislocation types on the microstructure and strengthening of the alloy.
MATERIALS & DESIGN
(2022)
Article
Engineering, Mechanical
Nan Kang, Mohamed El Mansori, Enhao Feng, Chunling Zhao, Yu Zhao, Xin Lin
Summary: This study compares the sliding wear behavior and microstructural evolution of Ti6Al4V samples prepared using forging, laser powder bed fusion (L-PBF), and laser directed energy deposition (L-DED). Both L-PBF and L-DED samples exhibit an nonequilibrium feature with lath/acicular alpha-Ti structure due to their high cooling rate. The L-DED sample shows the highest micro-hardness, while the wrought sample is harder at the nano-scale. The wrought sample also exhibits a lower wear rate and smaller surface plastic deformation compared to the L-DED and L-PBF processed samples.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Manufacturing
S. Spigarelli, C. Paoletti, M. Cabibbo, E. Cerri, E. Santecchia
Summary: This study investigates the creep response of a Ti-6Al-4V alloy produced by additive manufacturing at different temperatures. An analysis of data from literature on Ti-6Al-4V produced by conventional technologies and heat treated to form different microstructures was conducted to understand the effect of microstructure on creep behavior. The findings suggest that microstructure plays a role in determining ultimate tensile strength, but its influence diminishes at higher temperatures and lower stresses. A constitutive model developed for fcc metals successfully describes the creep response across different microstructures.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
J. R. Kennedy, A. E. Davis, A. E. Caballero, M. White, J. Fellowes, E. J. Pickering, P. B. Prangnell
Summary: The nature of chemical mixing and microstructure gradients across interface transitions in manufacturing tailored components with two high-performance dissimilar titanium alloys using the wire-arc additive manufacturing process has been explored. The study found that a relatively long-range chemical gradient occurs during the transition between layers produced with the two different titanium alloys, leading to a stepwise exponential decay composition profile. The alloy-alloy composition gradients had little effect on the grain structure but strongly influenced the transformation microstructure.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Harish Chandra Kaushik, Mahdi Habibnejad Korayem, Amir Hadadzadeh
Summary: This study investigates the kinetics of phase transformation in L-PBF titanium alloys using differential scanning calorimetry (DSC). Both non-isothermal and isothermal kinetics models were developed, and the effects of alloying elements and initial microstructure on the transformation kinetics were discussed. The results provide insights into the design of heat treatments to achieve desired microstructures and properties in L-PBF titanium alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Manufacturing
Xinyu Yang, Richard A. Barrett, Mingming Tong, Noel M. Harrison, Sean B. Leen
Summary: This paper presents the development of an integrated approach for microstructure prediction in laser beam powder bed fusion (PBF-LB) manufacturing of Ti-6Al-4V. The method is successfully validated and can potentially be used as a process design tool for tailored and optimized microstructures. The finite element model and phase transformation kinetics implemented within the stand-alone code based on FE predicted thermal histories are key components of the developed process-structure model.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Optics
Leilei Wang, Bowen Shi, Xukang Cai, Conghao Wu, Yanxiao Zhang, Xiaohong Zhan
Summary: LMD-WAAM hybrid process was used to fabricate Ti6Al4V and the effect of laser power on the grain evolution and mechanical properties was studied. Results showed that different thermal histories formed a graded microstructure and the interface zone had higher microhardness.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Weizhao Sun, Feihu Shan, Nanfu Zong, Hongbiao Dong, Tao Jing
Summary: This research investigates the phase transformation of Ti-6Al-4V during wire laser additive manufacturing using a density-based constituent phase simulation method. By increasing temperature and decreasing cooling rate, the undesirable alpha' phase can be narrowed or even eliminated. Additionally, the laser power of 3000 W results in more transformed alpha(B) without increasing alpha-lath thickness compared to the 2500 W case. The simulation shows promising prospects in predicting phase transformation and optimizing processing parameters.
MATERIALS & DESIGN
(2021)
Article
Nanoscience & Nanotechnology
S. Spigarelli, C. Paoletti, E. Cerri, E. Santecchia, M. Cabibbo
Summary: The present study investigates the creep response of a Ti-6Al-4V alloy produced by additive manufacturing and annealed above the 8-transus. The study aims to explain the observed differences in behavior compared to the same alloy annealed at lower temperatures. The results show that even minor differences in heat treatment conditions can cause significant variations in the creep threshold stress.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Polina Metalnikov, Ali Arslan Kaya, Guy Ben-Hamu, Dan Eliezer
Summary: This study compared the microstructural changes of Ti-6Al-4V alloy prepared by electron beam melting (EBM) and selective laser melting (SLM) in the presence of hydrogen. It was found that SLM Ti6Al-4V with acicular martensitic structure is more vulnerable to hydrogen-induced phase transformation and damage compared to EBM. Additionally, different hydrogen charging environments led to different microstructural changes in EBM Ti-6Al-4V.
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Minseok Gwak, Soyoung Kim, Dong Jun Lee, Jae Bok Seol, Hyokyung Sung, Tae-Hyun Nam, Sangshik Kim, Jung Gi Kim
Summary: This study investigates the effect of post-annealing on the microstructural evolution and mechanical properties of an additively manufactured Ti-6Al-4V alloy. The annealing conditions induce changes in the alloy's microstructure, resulting in a reduction in strength and an increase in ductility. Additionally, the tensile testing temperature affects the activity of the slip system in the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Manufacturing
Priyanshi Agrawal, Ravi Sankar Haridas, Surekha Yadav, Saket Thapliyal, Supreeth Gaddam, Ravi Verma, Rajiv S. Mishra
Summary: Additive friction stir deposition (AFSD) is a novel thermo-mechanical solid state additive manufacturing process that enables the production of high-performance components from recycled metals, reducing energy consumption and environmental waste.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Lu Ke, Chuanxi Li, Jun He, Qiang Shen, Yongming Liu, Yang Jiao
MATERIALS & DESIGN
(2020)
Article
Multidisciplinary Sciences
Duyu Chen, Yu Zheng, Lei Liu, Ge Zhang, Mohan Chen, Yang Jiao, Houlong Zhuang
Summary: A novel state of many-body systems, disordered hyperuniformity, has been discovered, which possesses characteristics similar to both a perfect crystal and a liquid or glass. Through a topological transformation in two-dimensional network structures, the continuous introduction of Stone-Wales defects can preserve hyperuniformity while changing the static structure factor and revealing unique electronic and mechanical behaviors associated with different classes of disorder in 2D materials.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Biochemistry & Molecular Biology
Yanping Liu, Yang Jiao, Da He, Qihui Fan, Yu Zheng, Guoqiang Li, Gao Wang, Jingru Yao, Guo Chen, Silong Lou, Jianwei Shuai, Liyu Liu
Summary: Cell migration, regulated by intracellular signaling pathways and extracellular matrix, plays crucial roles in physiological and pathological processes, but rigorous tools for analyzing its time-varying characteristics in heterogeneous microenvironments are lacking. A wavelet analysis approach is developed to derive time-dependent motility parameters from cell migration trajectories, showing superiority in estimating intrinsic transient motility parameters and being robust against various noises. The method serves as a powerful tool to accurately derive time-dependent motility parameters and further analyze time-dependent characteristics of cell migration in complex microenvironments.
Article
Physics, Applied
Rahul Raghavan, Pei-En Chen, Yang Jiao, Kumar Ankit
Summary: This study investigates the influence of seed morphology and contact angles on the morphological evolution of surface features in phase-separating alloy films using a three-dimensional phase-field approach, and quantifies film nanostructures using a statistical morphological descriptor. The research provides insights into kinetic pathways and reveals a hidden length scale correlation present at all contact angles, as well as highlights similarities between simulation-based findings and those obtained from co-deposition experiments on Cu-Ta and Cu-Mo-Ag films.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Yaopengxiao Xu, Pei-En Chen, Hechao Li, Wenxiang Xu, Yi Ren, Wanliang Shan, Yang Jiao
Summary: This article presents a computational framework for the modeling and design of a class of binary smart composites to achieve tunable dry adhesion. It explores the relationship between the microstructure of the composite and its gripping force, and proposes methods to optimize the composite microstructure to achieve desired adhesion properties.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Austin Naylor, Yu Zheng, Yang Jiao, Bo Sun
Summary: Altered tissue mechanics, specifically the micromechanics of collagen ECM surrounding invasive solid tumors, display directional anisotropy, spatial heterogeneity, and variations over time. The collective force generation of a tumor stiffens the ECM and leads to anisotropic local mechanics, while ECM degradation by cell-secreted matrix metalloproteinase softens the ECM and active traction forces from individual disseminated cells re-stiffen the matrix. These findings provide insight into the biophysical mechanisms responsible for the remodeling of ECM micromechanics surrounding an invading tumor.
Review
Physics, Applied
Duyu Chen, Houlong Zhuang, Mohan Chen, Pinshane Y. Huang, Vojtech Vlcek, Yang Jiao
Summary: Disordered hyperuniform (DHU) states are exotic states of condensed matter that lack long-range order but suppress density fluctuations. Recent discoveries of DHU in solid-state materials, such as amorphous carbon nanotubes and graphene, have revealed their unique properties and potential applications in electronic and thermal transport. This article provides a review of these important developments, emphasizing the applied and materials perspective, and discusses future directions for the design and discovery of DHU quantum materials for quantum information science and engineering.
APPLIED PHYSICS REVIEWS
(2023)
Article
Physics, Applied
Bamidele Aroboto, Shaohua Chen, Tim Hsu, Brandon C. Wood, Yang Jiao, James Chapman
Summary: This study introduces a universal graph neural network framework called SODAS++, which accurately quantifies the atomistic structural evolution of materials undergoing extreme changes in structure. The study showcases the application of SODAS++ in various complex systems and demonstrates its ability to capture the complex and non-linear pathway of material structure evolution.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Duyu Chen, Yu Liu, Yu Zheng, Houlong Zhuang, Mohan Chen, Yang Jiao
Summary: This work extends the concept of disorder hyperuniformity to quasi-one-dimensional materials like carbon nanotubes, and quantifies density fluctuations in amorphous carbon nanotubes with randomly distributed Stone-Wales defects. The study finds that all of these amorphous nanotubes exhibit hyperuniformity, regardless of their properties, and that they are energetically more stable than metallic nanotubes as more defects are introduced.
Article
Physics, Fluids & Plasmas
Pei-En Chen, Rahul Raghavan, Yu Zheng, Hechao Li, Kumar Ankit, Yang Jiao
Summary: We propose reduced-dimension metrics for measuring the distance between microstructures and quantifying their evolution pathways. These metrics effectively decompose the structural features in the system into regular polyhedral basis with different symmetries. They can be applied to extract phase separation dynamics and analyze pattern evolution, with potential applications in processing-structure-property relationships and real-time processing control of complex material systems.
Article
Materials Science, Multidisciplinary
Duyu Chen, Yu Zheng, Yang Jiao
Summary: This study reveals the conditions required to maintain hyperuniformity of crystalline states when transforming disordered inherent structures into crystalline states, by studying the concepts of topological defects, inherent structures, and hyperuniformity, providing insights into the discovery, design, and generation of novel disordered hyperuniform materials.
Article
Physics, Multidisciplinary
Ye Yuan, Yang Jiao, Yujie Wang, Shuixiang Li
Summary: The study investigates disordered packings of different shaped and frictional particles and finds universal packing characteristics, with coordination numbers approaching the same lower bound in the infinite friction limit. The nature of random loose packing (RLP) is illuminated, showing minimal structural correlations. Density fluctuations in frictional packings are strongly suppressed, expanding previous claims of hyperuniformity in frictionless packings.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Yu Zheng, Duyu Chen, Lei Liu, Yu Liu, Mohan Chen, Houlong Zhuang, Yang Jiao
Summary: Two distinct topological pathways have been discovered for the transformation of the pentagonal Cairo tiling into crystalline and random tilings through the introduction of Stone-Wales defects, controlled by orientation correlations among neighboring bonds. The defects in pentagonal 2D materials preserve shape and symmetry, making the intermediate structures metastable at room temperature. These random tilings maintain hyperuniformity and exhibit metallike electronic properties, making them potential candidates for forming Schottky barriers with semiconducting materials.
Article
Biochemical Research Methods
Jingru Yao, Guoqiang Li, Yang Jiao, Yu Zheng, Yanping Liu, Gao Wang, Lianjie Zhou, Hongfei Zhang, Xianquan Zhang, Jianwei Shuai, Qihui Fan, Fangfu Ye, Silong Lou, Guo Chen, Kena Song, Yong Liao, Liyu Liu
Summary: The study constructed a high-throughput in vitro biochip system to simulate various cell interactions and responses to biochemical conditions. Results showed that different drugs had distinct effects on breast epithelial cells and metastatic breast cancer cells in this system.
Article
Materials Science, Multidisciplinary
Duyu Chen, Yu Zheng, Chia-Hao Lee, Sangmin Kang, Wenjuan Zhu, Houlong Zhuang, Pinshane Y. Huang, Yang Jiao
Summary: Hyperuniform many-body systems exhibit suppressed density fluctuations at infinite wavelengths, but the introduction of localized defects can gradually destroy the hyperuniformity and lead to anti-hyperuniform structures with large-scale density fluctuations. Even small correlated displacements in the structure can significantly impact hyperuniformity.
