Article
Materials Science, Multidisciplinary
Thierry Baudin, Francois Brisset, Anatoliy Zavdoveev, Hiba Azzeddine
Summary: The evolution of microstructure and texture during friction stir lap welding of TIMETAL 21S sheets was investigated using electron backscatter diffraction. The study found that excellent grain refinement was achieved in the stir zone, while the thermo-mechanically affected zone showed discontinuous dynamic recrystallization. The heat affected zone exhibited similar microstructure to the base metal. The texture transformed from weak rolling-recrystallization texture in the base metal and heat affected zone to a shear texture dominated by D1 or D2 components in the stir zone and thermo-mechanically affected zone.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Yali Xu, Lingyu Xu, Liang Ding, Shuaifeng Zhang, Binbin Zhang, Hengpei Pan, Xiaoyang Lu, Peng Jiang
Summary: The microstructure and microtexture evolution of a near-alpha titanium alloy Ti-6321 during the post-annealing process were investigated. The results showed that the recrystallization, alpha grain globularization, coarsening, and phase transformation occurred, resulting in changes in macrozone sizes, morphologies, and texture components.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Long Huang, Zhichao Sun, Jing Cao, Zhikun Yin
Summary: This study investigated the precipitation mechanism of secondary alpha-phase and the formation of a bimodal microstructure in Ti6242S alloy cooled from the alpha + beta phase field. It was found that both grain boundary alpha and intragranular alpha were influenced by various factors, and two types of nucleation and growth modes coexisted. The formation of several microtextured areas in the bimodal microstructure was attributed to the preferential nucleation and growth of a special alpha variant, confirming the role of Burgers orientation relationship and self-accommodation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Beatriz Fernandez Silva, Daniel Suarez Fernandez, Ivan Green, Martin Jackson
Summary: The study examines the increase in hip replacement surgeries and the impact of microstructural evolution and quality in the manufacturing supply chain. By analyzing forgings from different manufacturers, it was found that variations in microstructure can affect part performance. The study suggests that material standards for orthopaedic implants should be more stringent to prevent quality variations.
MATERIALS CHARACTERIZATION
(2022)
Article
Metallurgy & Metallurgical Engineering
Zhen-guo Guo, Tie-jun Ma, Xia-wei Yang, Wen-ya LI, Jun Tao, Ju Li, Achilleas Vairis
Summary: In this study, a thermo-physical simulation was conducted to investigate the interface bonding behavior of linear friction welding (LFW) of a near-beta titanium alloy. The results showed that the peak shear stress in the bonding zone (BZ) during hot compression increased with decreasing deformation temperature and increasing strain rate, while the width of BZ decreased with increasing deformation temperature and strain rate. The joint mechanism was identified as continuous dynamic recrystallization (CDRX), and the degree of CDRX in BZ increased with increasing compression displacement, deformation temperature, and strain rate. Texture analysis revealed the formation of {112}[111] texture in the margin of BZ and {110}[001] texture in the center of BZ.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Chemistry, Physical
H. Sun, Z. B. Zhao, Q. J. Wang, T. Y. Zhou, N. Li, Y. H. Liu
Summary: The evolution of the texture and microstructure of TiB-TC25G composites heat-treated in the high ?+? phase field was studied with different cooling rates. The study found that the size of ? colonies and the thickness of individual secondary ? laths increased with decreasing cooling rates, leading to the formation of equiaxed secondary ? grains. The intensity of ? texture in TiB-TC25G composites decreased with decreasing cooling rate due to the presence of TiB, and some equiaxed secondary ? grains did not follow the Burgers orientation relationship (BOR) with the parent ? grain.
Article
Materials Science, Multidisciplinary
Tan Haibing, Zhao Zibo, Yang Jiuxu, Liu Yuanhong, Wang Qingjiang, Liu Jianrong, Zhu Shaoxiang
Summary: A heterogeneous microstructure was observed in a compressed near-alpha titanium alloy with a bimodal microstructure. The influence of local grain orientation on the microstructural morphology was analyzed, revealing a close relationship between the two. The orientation relationship between primary alpha and surrounding beta grains affects the recrystallization process and the morphology of the transformed alpha phase.
RARE METAL MATERIALS AND ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Zhiyuan Jia, Qinyang Zhao, Yong Zhang, Yiku Xu, Yongnan Chen, Xiaotong Deng, Fengying Zhang, Lin Wang, Dizi Guo
Summary: The mechanical properties, microstructure evolution mechanism, texture variation process, and deformation mechanism of a near-alpha CT20 titanium alloy with different hot and cold rolling reductions were thoroughly investigated. It was found that the increase in rolling reduction led to a gradual increase in tensile strength and decrease in ductility. The mechanical properties were better along the rolling direction (RD) than the transverse direction (TD), which was attributed to the increase in grain boundary and dislocation density. The work-hardening rates and mechanical properties were influenced by the preferred orientation of alpha phase and the slip distances of dislocation during deformation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Haiyang Jiang, Fuqing Jiang, Bijun Xie, Bing Wang, Bin Xu, Xu Hu, Liang Xu, Zhangxun He, Hao Zhang, Yuxi Wu, Mingyue Sun
Summary: This study investigates the influence of cooling rate on microstructural evolution and mechanical properties of titanium alloy forgings. By using mechanical tests and microscopy techniques, it is found that increasing cooling rate leads to a decrease in secondary alpha phase width and an increase in ultimate tensile strength and yield strength. However, the impact property of the alloy decreases due to a decrease in primary alpha phase volume fraction. Quantitative links between cooling rate and alpha phase width, as well as between yield strength and alpha phase width, are established.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Changjiang Zhang, Xi Jiang, Jianchao Han, Shuzhi Zhang, Peng Peng, Hong Feng, Tao Wang, Peng Cao
Summary: This study focuses on the texture transformation and uneven microstructure evolution during hot compression of 2 vol% TiC/Ti-4Al-1Sn-2Zr-5Mo-8 V-2.5Cr composites. After hot compression, uneven microstructures, including local high deformed region (HDR) and low deformation region (LDR), were observed. The area and width of elongated grains decreased in the HDR, while the LDR showed the opposite trend as temperature and deformation rate increased. The sequence of texture transformation with different lattice rotation axis during hot compression of TMCs was established based on lattice rotation during continuous recrystallization (CDRX).
MATERIALS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Yu Zhou, Ke Wang, Honghui Li, Xin Wen, Renlong Xin
Summary: This study investigates the influence of equiaxed α content (a(e)) and configuration of α lamellas on the deformation mechanism and tensile properties of near-α titanium alloy. The bimodal microstructures (BMs) comprised of a(e) and parallel α lamellas (a colony) and basket-weave α lamellas (a basketweave) are denoted as BMC and BMB, respectively. With decreasing content of a(e), BMB shows higher strength and lower elongation reduction compared to BMC. Under the same content of a(e), BMB exhibits higher strength and better elongation than BMC. The deformation mechanisms of fully equiaxed microstructure (FEM), BMC, and BMB are investigated, revealing that prismatic slip is the dominant slip system and dislocation multiplication of prismatic slip dominates all a(e) grains. Basket-weave microstructure shows better slip transfer restraint and absence of continuous a(GB), leading to higher strength and better elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Dongyang Qin, Shenglu Lu, Yulong Li
Summary: This paper investigates the influence of loading directions on the mechanical performance and failure mechanisms of a mill-annealed TC4 alloy thick plate. The study finds that loading directions have no effect on the yield strength and flow stress of the alloy, but significantly affect the fracture strain. The deformation mechanisms in the rolling direction and traverse direction are dislocation slip, while in the normal direction, it is dislocation slip and twinning. Additionally, loading directions also influence the formation of adiabatic shearing bands (ASBs) and the compressive fracture mechanism of the alloy plate.
Article
Materials Science, Multidisciplinary
Dayu Shu, Li Wang, Qiang Chen, Yi Yao, Minghui Li, Rui Wang
Summary: This study evaluated the microstructure evolution of TB6 titanium alloy during isothermal compression, finding that the recrystallization of beta phase is sensitive to strain rates, while the average grain size of alpha phase slightly increases with decreasing strain rates. The incomplete and inheritable character of beta recrystallization leads to significant beta microtexture after deformation, with different microtexture components observed under different deformation conditions.
Article
Materials Science, Multidisciplinary
Min Qi, Yingjie Ma, Jie Yang, Yandi Jia, Hanbo Weng, Sensen Huang, Ruixue Zhang, Jianke Qiu, Jiafeng Lei, Rui Yang
Summary: This study investigated the microtexture evolution of alpha in alpha + beta titanium alloys with different Mo content during thermomechanical processing. The results show that the addition of Mo element significantly weakens the microtexture of the prior alpha colony in Ti-6Al-2Sn-4Zr-6Mo (Ti6246) alloy. The study demonstrates the effect of Mo content on the microtexture evolution during thermo-mechanical processing.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Pradyumna Kumar Parida, Arup Dasgupta, Shyam Kanta Sinha
Summary: This study compares the microstructure and microtexture of 9Cr ODS steel and 18Cr ODS steel, finding similar size distribution of dispersoids but different morphology of ferrite grains. 9Cr ODS steel exhibits a nearly equiaxed tempered martensitic structure, while 18Cr ODS steel has an elongated bamboo-like ferrite structure.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
Daniel P. Satko, Joshua B. Shaffer, Jaimie S. Tiley, S. Lee Semiatin, Adam L. Pilchak, Surya R. Kalidindi, Yoji Kosaka, Michael G. Glavicic, Ayman A. Salem
Article
Materials Science, Multidisciplinary
Mohsen Seifi, Ayman Salem, Jack Beuth, Ola Harrysson, John J. Lewandowski
Article
Materials Science, Multidisciplinary
S. V. Zherebtsov, G. S. Dyakonov, G. A. Salishchev, A. A. Salem, S. L. Semiatin
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2016)
Article
Engineering, Mechanical
Mohsen Seifi, Ayman Salem, Daniel Satko, Joshua Shaffer, John J. Lewandowski
INTERNATIONAL JOURNAL OF FATIGUE
(2017)
Article
Materials Science, Multidisciplinary
S. V. Zherebtsov, G. S. Dyakonov, A. A. Salem, V. I. Sokolenko, G. A. Salishchev, S. L. Semiatin
Article
Materials Science, Multidisciplinary
Surya R. Kalidindi, Stephen R. Niezgoda, Ayman A. Salem
Article
Nanoscience & Nanotechnology
A. A. Salem, M. G. Glavicic, S. L. Semiatin
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2008)
Article
Nanoscience & Nanotechnology
A. A. Salem, S. L. Semiatin
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2009)
Article
Nanoscience & Nanotechnology
S. V. Zherebtsov, G. S. Dyakonov, A. A. Salem, S. P. Malysheva, G. A. Salishcheva, S. L. Semiatin
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2011)
Article
Nanoscience & Nanotechnology
G. S. Dyakonov, S. Mironov, S. V. Zherebtsov, S. P. Malysheva, G. A. Salishchev, A. A. Salem, S. L. Semiatin
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2014)
Article
Materials Science, Multidisciplinary
G. A. Sargent, K. T. Kinsel, A. L. Pilchak, A. A. Salem, S. L. Semiatin
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2012)
Article
Materials Science, Multidisciplinary
Jaimie Tiley, Joshua Shaffer, Adam Shiveley, Adam Pilchak, Ayman Salem
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2014)
Article
Nanoscience & Nanotechnology
Tamas Ungar, Gabor Ribarik, Levente Balogh, Ayman A. Salem, S. Lee Semiatin, Gavin B. M. Vaughan
SCRIPTA MATERIALIA
(2010)
Article
Engineering, Manufacturing
Ayman A. Salem, Joshua B. Shaffer, Richard A. Kublik, Luke A. Wuertemberger, Daniel P. Satko
INTEGRATING MATERIALS AND MANUFACTURING INNOVATION
(2017)