Article
Materials Science, Multidisciplinary
Hardy Mohrbacher, Linda Bacchi, Gloria Ischia, Stefano Gialanella, Michele Tedesco, Fabio D'Aiuto, Renzo Valentini
Summary: Press hardening steel commonly uses titanium microalloying to protect boron from nitrogen, ensuring the hardenability effect during die quenching. Additional microalloying elements, such as niobium and vanadium, have been found to improve toughness, bendability, and hydrogen embrittlement resistance. A new press hardening steel incorporates all three microalloying elements and shows enhanced performance compared to standard grade steel.
Article
Materials Science, Multidisciplinary
Irina Rodionova, Nataliya Arutyunyan, Andrey Amezhnov, Dmitrii D'yakonov, Yuliya Gladchenkova, Sergey Dunaev, Irina Vasechkina
Summary: This study investigates the effect of the structural state of cold-rolled low-carbon niobium microalloyed steels on their corrosion resistance. It is found that the size of nanosized niobium carbide precipitates is an important structural factor influencing the corrosion resistance of the rolled products. The temperature parameters of the hot rolling and annealing processes have been identified to impact the formation of these precipitates.
Article
Materials Science, Multidisciplinary
Yu Tian, Hao Yu, Tao Zhou, Kun Wang, Zimeng Zhu
Summary: This study reveals the precipitation behavior and morphological characteristics of MX precipitates in deformed Ti-V-Nb multi-microalloyed steels, introducing the L parameter model for evaluating the shape of precipitates. The evolution rules of precipitate morphology provide insights for developing high-performance microalloyed steels.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Yaoxiang Duan, Han Chen, Zhe Chen, Lei Wang, Mingliang Wang, Jun Liu, Fengguo Zhang, Haowei Wang
Summary: The influence of different precipitate-dislocation interactions on PLC bands and surface roughness in AlMgScZr alloy was investigated. Shearable precipitates were found to decrease the number of PLC bands and surface roughness, providing guidance for designing structural materials with desirable mechanical property and surface quality.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Metallurgy & Metallurgical Engineering
Shunsuke Taniguchi, Genichi Shigesato, Masaaki Sugiyama
Summary: The interfacial atomic structures of nanometer-sized titanium carbides (TIC) in ferritic steels were investigated. Both coherent and semi-coherent interfaces were observed between TiC precipitates and the ferrite matrix.
ISIJ INTERNATIONAL
(2022)
Article
Metallurgy & Metallurgical Engineering
Xiang-dong Huo, Kang He, Ji-nian Xia, Lie-jun Li, Song-jun Chen
Summary: The microstructure transformation and precipitation behavior of nano-carbides in Ti microalloyed steel during isothermal process were studied, and it was found that gamma -> alpha phase transformation and TiC precipitation occur during the process. The interphase precipitation of TiC mostly occurs at the period of the phase transformation, while the random precipitation of TiC mostly occurs on the ferrite after the phase transformation. Initial increment in yield strength comes from phase transformation strengthening, and precipitation hardening effect becomes more important with increase in isothermal time, reaching maximum value at the precipitation finished point of the PTT curve.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
N. Xiao, Y. Z. Zeng, X. L. Lu, Y. H. Sun, B. Z. Sun
Summary: The gamma' basal platelets and W (Mg3Dy2Zn3) nanoparticles play crucial roles in precipitation strengthening of the aged Mg-2Dy-0.5Zn ternary alloy, leading to peak hardness. Furthermore, most W particles nucleate on the gamma' basal platelet and grow between adjacent platelets, significantly constraining their coarsening and final size, postponing performance degradation of the alloys.
Article
Materials Science, Multidisciplinary
Shuai Xu, Rui Cao, Junheng Gao, Yu Zhang, Haitao Zhao, Shuize Wang, Yuhe Huang, Guilin Wu, Honghui Wu, Chaolei Zhang, Xinping Mao
Summary: In this study, the microstructures and mechanical properties of interphase precipitation strengthening micro-alloyed steels were investigated. The addition of Cr was found to increase the yield strength without significant decrease of ductility. Thermodynamics analysis revealed that the addition of Cr led to grain refinement and decrease of sheet spacing of nanoprecipitates. Calculations showed that the decrease of interphase-precipitated carbides sheet spacing and the refinement of grain size were responsible for the strength enhancement of Cr microalloyed steel.
MATERIALS CHARACTERIZATION
(2024)
Article
Microscopy
Johannes Webel, Louis Weber, Emina Vardo, Dominik Britz, Tobias Kraus, Frank Muecklich
Summary: APT provides sub-nm resolution for analyzing complex industrial steels, particularly in resolving carbonitride precipitates. Two encapsulation-based approaches are demonstrated to increase the yield by marking precipitation sites or encapsulating particles in a silicon oxide network at high density. This method significantly enhances the spatial and chemical accuracy in analyzing pure Nb, Ti, and mixed Nb-Ti carbonitrides.
Article
Materials Science, Multidisciplinary
Junaidi Syarif, Khaled Badawy
Summary: The study found that copper particles strengthen ferritic iron, but when the thickness reduction exceeds 30%, it leads to the dissolution of copper particles and a decrease in strength.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Yifan Wang, Yanli Lu, Shiyao Zhang, Haipeng Zhang, Hong Wang, Zheng Chen
Summary: Through TEM and tensile testing, the microstructure of nanoscale precipitates formed in the primary a-Al grains of a cast Al-7Si-Mg alloy during ageing at different temperatures has been systematically investigated. The interactions of dislocations with different types of precipitates were analyzed, revealing the strengthening effects on mechanical properties. The study also discussed the moire fringes and FFT pattern of beta phase, as well as the unique phenomenon of beta phase nucleation and growth on the surface of Si particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Peng Liu, Wan Zheng, Guangqiang Li, Huirong Zhang, Wenwen Zhang, Chunfeng Wang
Summary: Ti-bearing microalloyed steels with Ti content of 0.10-0.15 wt% were studied to analyze the hot ductility evolution mechanism. The third brittle temperature range of 600-890 °C is mainly attributed to the thin proeutectoid ferrite film and precipitated titanium carbonitride particles. The tensile samples at 890-1350 °C exhibit good hot ductility due to the dynamic recrystallization of deformed austenite.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Shuaishuai Qin, HuiXu Zhou, Xu Huang, Weidong Huang, Guanglei Lin, Taiki Tsuchiya, Seungwon Lee, Kenji Matsuda
Summary: Boundaries are often observed within grains during homogenization/solution cooling of Al-Mg-Si billets. This study confirmed that the formation of these boundaries is caused by a complex but interesting heterogeneous precipitation behavior. This behavior includes both high temperature and low temperature stages, with the latter being rarely observed during aging treatment with deformation induced dislocations. During the high temperature stage (>350 degrees C) of cooling, rod/lath-like precipitates formed at dislocations tend to grow along two or three (100)Al directions; however, as the temperature decreases to around 200 degrees C, the precipitates tend to align and parallel to each other, and string-like precipitates appear along the dislocations between the precipitates.
Article
Nanoscience & Nanotechnology
Ji Ho Shin, Byeong Seo Kong, Hyun Joon Eom, Changheui Jang, Hyeonsu Do, Dongchan Jang
Summary: An austenitic stainless steel with high density of nanosized NbC precipitates was tested using micropillar compression tests. The study observed the dissolution and reprecipitation of NbC precipitates during compressive deformation, leading to modifications of existing strengthening models for more accurate predictions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
L. G. Sesma, B. Lopez, B. Pereda
Summary: In this study, multipass torsion tests and coiling simulations were conducted on high titanium and microalloyed steel. The effects of austenite grain size and strain accumulation on precipitation strengthening were observed, leading to different coiling simulation temperatures for the highest mechanical strength.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Metallurgy & Metallurgical Engineering
Chenghao Song, Hao Yu, Jun Lu, Tao Zhou
STEEL RESEARCH INTERNATIONAL
(2019)
Article
Nanoscience & Nanotechnology
Jun Lu, Hao Yu, Xiaoni Duan, Chenghao Song
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Nanoscience & Nanotechnology
Chenghao Song, Haoliang Wang, Zhenzhong Sun, Zhengying Wei, Hao Yu, Haibin Chen, Yanlin Wang
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Metallurgy & Metallurgical Engineering
Chenghao Song, Haoliang Wang, Zhenzhong Sun, Zhengying Wei, Hao Yu, Jun Lu
STEEL RESEARCH INTERNATIONAL
(2020)
Article
Engineering, Mechanical
Chenghao Song, Haoliang Wang, Zhenzhong Sun, Zhengying Wei, Hao Yu, Haibin Chen, Yanlin Wang, Jun Lu
INTERNATIONAL JOURNAL OF FATIGUE
(2020)
Article
Nanoscience & Nanotechnology
Chenghao Song, Haoliang Wang, Zhenzhong Sun, Hao Yu
Summary: The addition of titanium has been shown to effectively suppress the formation of transition iron carbides in I&QP steel. The precipitation of TiC particles affects the stability of retained austenite and has an important impact on mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Chenghao Song, Haoliang Wang, Zhenzhong Sun, Hao Yu
Summary: By controlling the amount of retained austenite and precipitate particles, mechanical properties of medium Mn steel alloyed with Cu, Ni and Al can be tailored. Research indicates that a large number of precipitate particles form at the aging time of 1 h, and then the volume fraction of the particles continuously decreases, with little change in average particle size as holding time increases, indicating the dissolution of the precipitate particles.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Haoliang Wang, Daniel Kuok Zheng Lai, Juping Xu, Wen Yin, Chenghao Song, Yuliang Zhao, Yang Yang, Matthias Bonisch, Zhenzhong Sun
Summary: This article discusses the method of obtaining customized linear thermal expansion by controlling the thermal expansion of cold-worked martensitic titanium alloys, and introduces a new approach to regulate thermal expansion using orthorhombic alpha ''(iso) formed by diffusion. Compared to cold-worked martensitic alloys, this method can achieve a significantly broader temperature range of tailored linear thermal expansion.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Physical
Xiongfei Yang, Hao Yu, Chenghao Song, Lili Li
Summary: The study investigated TRIP-assisted annealed martensitic steels with various microalloying additions and their tensile behaviors under different conditions, revealing a decrease in both tensile strength and ductility under hydrogen charging. The presence of hydrogen induced embrittlement was observed, with microalloying precipitates acting as traps to reduce this effect by fixing hydrogen and reducing its diffusive motion towards defects in the microstructure matrix.
Article
Nanoscience & Nanotechnology
Chenghao Song, Haoliang Wang, Zhenzhong Sun, Juping Xu, Huaican Chen, Wen Yin
Summary: This study proposes a method of substituting Si for Al to design a lightweight steel with ultra-high ultimate tensile strength and good ductility. The addition of Si contributes to a high fraction of screw dislocations and transformation strain of retained austenite, which enhances the ductility of the steel. This work challenges the long-standing belief that Si makes steel brittle and deteriorate, and offers a new approach to alloy design by adjusting dislocation character and transformation strain.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Xiangyun Zhang, Jialong Wang, Shiyun Liu, Ling Yan, Chenghao Song, Hao Yu
Summary: This study aimed to develop NiAl precipitation-strengthened HSLA steels by introducing Al to the alloy composition. The results showed that Al facilitated the precipitation of nanoparticles, improved the grain boundary structure, and optimized the dislocation distribution, leading to a steel with good ductility while maintaining strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Metallurgy & Metallurgical Engineering
Wee King Law, Ziyang Wu, Chenghao Song, Haoliang Wang, Kok-Cheong Wong, Chin Seong Lim, Zhenzhong Sun
Summary: Taguchi methods and gray relational analysis were used to optimize the selective laser melting (SLM) process parameters for 18Ni-300 maraging steel. The optimal configuration (275 W, 700 mm/s, 0.08 mm) was identified, which resulted in improved tensile strength, elongation, hardness, and impact toughness. Increasing the linear energy density (EL) was found to be beneficial for producing samples with better mechanical properties.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Chenghao Song, Zhenshan Zhang, Wenyuan Wu, Haoliang Wang, Zhenzhong Sun, Yuhui Yang, Weifeng He, Juping Xu, Yuanguang Xia, Wen Yin, Zhiyan Cheng
Summary: This study investigated the effect of Si on the deformation behavior of martensite in hot-rolled medium Mn steels without any heat treatment. It was found that the addition of Si increased the dislocation density and decreased the crystallite size within martensite. The ultra-high ultimate tensile strength (UTS) and good ductility of the Si-added steel were attributed to the enhanced strain hardening rate caused by Si alloying and dislocation cell formation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Yuhui Yang, Xin Wei, Zhili Long, Chenghao Song, Chunxiao Xie, Jiajie Lin
Summary: The Grey-Taguchi method was used to optimize the static force, ultrasonic amplitude, feed rate, and rolling spacing parameters of 42CrMo steel treated by the ultrasonic surface rolling process (USRP). Nine sets of experiments and grey relational analysis were conducted to obtain the optimum combination of mechanical properties for USRP. The influence of processing parameters on mechanical properties was investigated, and the effects of plastic strain, dislocation, and cementite evolution on the mechanical properties were analyzed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
