Isij International最新文献_第9页

A New type of Online Accelerated Cooling Equipment for Seamless Steel Pipe and Its Application Experiments 一种新型无缝钢管在线加速冷却设备及其应用试验

IF 1.8 4区材料科学

Isij International Pub Date : 2024-04-03 DOI: 10.2355/isijinternational.isijint-2024-038

Long-jie Tao, Yan-chun Liu

引用次数: 0

Hydrogen Embrittlement Susceptibility of Linear Friction Welded Medium Carbon Steel Joints 线性摩擦焊接中碳钢接头的氢脆敏感性

IF 1.8 4区材料科学

Isij International Pub Date : 2024-04-03 DOI: 10.2355/isijinternational.isijint-2024-016

Riki Toramoto, Takayuki Yamashita, Kohsaku Ushioda, Tomohiko Omura, Hidetoshi Fujii

{"title":"Hydrogen Embrittlement Susceptibility of Linear Friction Welded Medium Carbon Steel Joints","authors":"Riki Toramoto, Takayuki Yamashita, Kohsaku Ushioda, Tomohiko Omura, Hidetoshi Fujii","doi":"10.2355/isijinternational.isijint-2024-016","DOIUrl":"https://doi.org/10.2355/isijinternational.isijint-2024-016","url":null,"abstract":"In this study, linear friction welding is applied to join JIS-S45C medium carbon steel with ferrite and pearlite structures at temperatures above and below the A1 point. Additionally, low-strain-rate tensile tests are conducted both in air and with a cathodic hydrogen charge to evaluate the hydrogen-embrittlement susceptibility of the linear friction-welded joints under both joining conditions. Results of hydrogen thermal-desorption analysis show that the hydrogen-charging conditions in this study simulated atmospheric corrosion conditions. The joining zone of the above-A1 joint comprises fine martensite and ferrite, whereas that for the below-A1 joint comprises ultrafine ferrite and cementite. In air tensile tests, both joints fractured in the base-metal region, thus suggesting the high reliability of the joints. In the hydrogen-charged tensile test, the above-A1 joints exhibit premature fracture at the joining zone. By contrast, the below-A1 joints exhibit base-metal fractures, thus suggesting that the joints are highly reliable in a hydrogen environment. Fracture-surface observations show that the above-A1 joints exhibit cleavage fractures in the martensite-dominated region. Tensile tests on heat-treated martensite S45C specimens show that their fracture strength decreased significantly in a hydrogen environment. Therefore, the joint fracture is due to the significant decrease in the fracture strength of martensite formed in the above-A1 joints in the hydrogen environment. The linear friction-welded medium carbon steel joints below the A1 temperature can ensure reliability even in a hydrogen environment.\u0000","PeriodicalId":14619,"journal":{"name":"Isij International","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140601298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of ferrosilicon addition on silicon-oxygen equilibria in high-silicon steels 添加硅铁对高硅钢中硅氧平衡的影响

IF 1.8 4区材料科学

Isij International Pub Date : 2024-03-28 DOI: 10.2355/isijinternational.isijint-2024-018

Sanjay Pindar, Manish M. Pande

引用次数: 0

Comparison between the Lüders and Portevin–Le Chatelier bands in the low-strain-rate tensile testing of ultralow-carbon ferritic steel 超低碳铁素体钢低应变速率拉伸试验中 Lüders 带和 Portevin-Le Chatelier 带的比较

IF 1.8 4区材料科学

Isij International Pub Date : 2024-03-28 DOI: 10.2355/isijinternational.isijint-2024-021

Eibun Kyo, Seung-Yong Lee, Ryota Nagashima, Nobuo Nakada, Fusae Shiimori, Nobusuke Kariya, Shinjiro Kaneko

{"title":"Comparison between the Lüders and Portevin–Le Chatelier bands in the low-strain-rate tensile testing of ultralow-carbon ferritic steel","authors":"Eibun Kyo, Seung-Yong Lee, Ryota Nagashima, Nobuo Nakada, Fusae Shiimori, Nobusuke Kariya, Shinjiro Kaneko","doi":"10.2355/isijinternational.isijint-2024-021","DOIUrl":"https://doi.org/10.2355/isijinternational.isijint-2024-021","url":null,"abstract":"In ferritic steels, solute carbon (C) causes two types of discontinuous stress fluctuations that are accompanied by local deformation bands in the stress–strain curves. One is the yield drop with the Lüders band at yielding, and the other is the serrated flow stress with Portevin–Le Chatelier (PLC) bands during the strain hardening stage, that is, the PLC effect. Lüders band and PLC bands can be explained by static strain aging and dynamic strain aging, SSA and DSA, respectively. These difference in strain aging mechanics distinguish the Lüders band and PLC bands and qualitatively explain when they appear in the stress–strain curve at the yielding and strain-hardening stages. Nevertheless, Lüders band and PLC effect occur in carbon steels at room temperature and 373–473 K, respectively. Therefore, fundamental difference between these bands remains unclear because it is difficult to compare them under the same tensile conditions. In this study, low-strain-rate tensile tests were performed on ultralow-carbon ferritic steel at ambient temperature to compare the bands under the same deformation conditions. In addition to the Lüders band, the formation and propagation of PLC bands were observed at strain rates lower than 1.0 × 10-4 s-1, and the PLC effect became more pronounced as the strain rate decreased and the carbon content increased. Furthermore, local strain analysis using digital image correlation revealed that the dislocation movement was much faster than C diffusion only in the Lüders band, which is attributed to the difference in the strain-aging mechanism.\u0000","PeriodicalId":14619,"journal":{"name":"Isij International","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140313077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Paint Baking Treatment on Mechanical Properties of Resistance Spot Welded Q&P 980 Steel 油漆烘烤处理对电阻点焊 Q&P 980 钢机械性能的影响

IF 1.8 4区材料科学

Isij International Pub Date : 2024-03-22 DOI: 10.2355/isijinternational.isijint-2023-483

Dileep Chandran Ramachandran, Adib Salandari-Rabori, Abdelbaset R. H. Midawi, Andrew Macwan, Elliot Biro

引用次数: 0

Burden Particle Contour Extraction from Digital Elevation Model of Blast Furnace Rough Surface 从高炉糙面数字高程模型中提取负担颗粒轮廓线

IF 1.8 4区材料科学

Isij International Pub Date : 2024-03-19 DOI: 10.2355/isijinternational.isijint-2024-047

Jiuzhou Tian, Akira Tanaka, Di Gao, Qingwen Hou, Xianzhong Chen

引用次数: 0

Relationship between the nonuniformity of packed structure and fluid permeability in a model scrap preheating vessel 废钢预热容器模型中填料结构的不均匀性与流体渗透性之间的关系

IF 1.8 4区材料科学

Isij International Pub Date : 2024-03-18 DOI: 10.2355/isijinternational.isijint-2023-458

Manabu Tange, Haruki Fujii, Haruto Fujizoe, Yasuo Kishimoto, Arihiro Matsunaga, Yoshihiro Miwa, Koichi Tsutsumi

{"title":"Relationship between the nonuniformity of packed structure and fluid permeability in a model scrap preheating vessel","authors":"Manabu Tange, Haruki Fujii, Haruto Fujizoe, Yasuo Kishimoto, Arihiro Matsunaga, Yoshihiro Miwa, Koichi Tsutsumi","doi":"10.2355/isijinternational.isijint-2023-458","DOIUrl":"https://doi.org/10.2355/isijinternational.isijint-2023-458","url":null,"abstract":"Recycled scrap is used as a raw material in an electric arc furnace (EAF). Certain EAF systems preheat the scrap using its exhaust gas to save energy. However, the actual operations cannot recover sufficient thermal energy of gas owing to non-uniform flow distribution such as blow-out and stagnation to cause the portion that is not melted. This study investigated the relationship between packed structure and gas permeability in a tank filled with random- and multiple-shaped solids. Visualization and flow measurement experiments were conducted. The packing structure was measured using laser-induced fluorescence by scanning a laser sheet through the tank to measure the three-dimensional distribution of the packed structure. The flow velocity distribution was measured using particle image velocimetry by preparing multiple directions of the laser sheet with respect to the water tank and reconstructing a three-dimensional three-component velocity distribution. Under high packing ratio, the flow structure was obstructed by the packing material, resulting in stagnation areas with low flow velocity. In contrast, at low packing ratio, the stagnation area was smaller, and the global flow field was stable. Furthermore, histograms of the flow velocity distributions suggested that stagnation occurred under high packing ratio conditions, while a global flow field occurred at low packing ratios. These results are applicable in the design of preheating equipment, such as exhaust gas recycling, preheating furnace, or clamshell. Thus, this study provides valuable insights into flow nonuniformity and the design of preheating equipment to improve operational efficiency and safety.\u0000","PeriodicalId":14619,"journal":{"name":"Isij International","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140148084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Innovative Gasification Process of Used Plastic by Using Fluidized Bed 利用流化床开发废旧塑料创新气化工艺

IF 1.8 4区材料科学

Isij International Pub Date : 2024-03-15 DOI: 10.2355/isijinternational.isijint-2023-479

Koichi Momono, Jun Ishii, Seiji Hosohara, Hideo Kijima

{"title":"Development of Innovative Gasification Process of Used Plastic by Using Fluidized Bed","authors":"Koichi Momono, Jun Ishii, Seiji Hosohara, Hideo Kijima","doi":"10.2355/isijinternational.isijint-2023-479","DOIUrl":"https://doi.org/10.2355/isijinternational.isijint-2023-479","url":null,"abstract":"Used plastic waste flowing into oceans has become a worldwide problem. Since international trade in used plastics has been regulated in recent years, a large amount of used plastic now requires domestic disposal. On the other hand, used plastics with a high calorific value could be used as an energy source. Therefore, the authors developed a new used plastic gasification process utilizing a fluidized bed. In this process, used plastics are decomposed in a fluidized bed reactor at around 600 °C, which is a lower temperature than that used in current commercial processes. A higher calorific value gas could be obtained by gasification reaction control at the lower temperature. Hydrogen enriched gas generated by the water-gas shift reaction (WGSR) of basic oxygen furnace gas was used as the fluidizing or gasifying agent, since hydrogen was considered to have an effect of promoting the decomposition reaction of the hydrocarbons in used plastics. As the fluid medium in the reactor, catalysts were used to improve gasification efficiency. In this study, the effect of the gasification temperature and type of catalyst on the calorific value of the produced gas and gasification efficiency were investigated. High calorific value gas (LHV: 5000 kcal/Nm3) could be successfully produced by pyrolysis of used plastics by using an appropriate gasification temperature and catalyst.\u0000","PeriodicalId":14619,"journal":{"name":"Isij International","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140147642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Use of X-ray CT imaging to quantitatively analyze the effects of the pore morphology on the tensile properties of CP-Ti L-PBF materials 利用 X 射线 CT 成像定量分析孔隙形态对 CP-Ti L-PBF 材料拉伸性能的影响

IF 1.8 4区材料科学

Isij International Pub Date : 2024-03-14 DOI: 10.2355/isijinternational.isijint-2023-431

Yuji Shigeta, Naoyuki Nomura, Katsuyoshi Kondoh, Kentaro Uesugi, Masato Hoshino, Masatoshi Aramaki, Yukiko Ozaki

{"title":"Use of X-ray CT imaging to quantitatively analyze the effects of the pore morphology on the tensile properties of CP-Ti L-PBF materials","authors":"Yuji Shigeta, Naoyuki Nomura, Katsuyoshi Kondoh, Kentaro Uesugi, Masato Hoshino, Masatoshi Aramaki, Yukiko Ozaki","doi":"10.2355/isijinternational.isijint-2023-431","DOIUrl":"https://doi.org/10.2355/isijinternational.isijint-2023-431","url":null,"abstract":"Controlling the shape, size, and arrangement of residual defects (pores) in additive-manufactured materials is essential for improving their strength and reliability. However, quantifying the shape and arrangement of individual pores in such materials remains a challenge. This study aimed to clarify the effect of pore configurations that determine the tensile properties of laser powder-based fusion (L-PBF) materials. First, the 3D pore-configurations of pure titanium L-PBF materials fabricated under different beam energy densities were visualized using high-intensity X-ray computed tomography (CT). Subsequently, the porosity, volume equivalent diameter, and sphericity of each pore were quantified by 3D analysis of each CT image, and their correlations with the tensile properties were analyzed. The results showed that, unlike conventional sintered materials, the 0.2% yield stress did not correlate with the porosity of the specimen, suggesting heterogeneity in the hydrostatic component of stress acting on pores. This was connected to periodic fluctuation in the local porosity of the layers sliced perpendicular to the building direction. Furthermore, for specimens fabricated under relatively low beam energy densities, the porosity of the lowest density sliced layer was negatively correlated with tensile strength and total elongation, whereby the local low-density layer dominated the tensile properties. For specimens fabricated under the high energy densities where keyholes were generated, the maximum pore diameter rather than the local layer porosity was more predominate. Thus, it is evident that local structures such as local low-density regions or larger pores dominate the ductile properties of Ti L-PBF materials in terms of their tensile properties.\u0000","PeriodicalId":14619,"journal":{"name":"Isij International","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140147752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of the Cr and Ni concentrations on the fatigue and corrosion resistances of Fe−Mn−Cr−Ni−Si alloys for seismic damping applications 铬和镍浓度对用于减震应用的 Fe-Mn-Cr-Ni-Si 合金的抗疲劳性和耐腐蚀性的影响

IF 1.8 4区材料科学

Isij International Pub Date : 2024-03-14 DOI: 10.2355/isijinternational.isijint-2023-437

Fumiyoshi Yoshinaka, Yusuke Tsutsumi, Tomoya Nagira, Susumu Takamori, Satoshi Emura, Takahiro Sawaguchi, Hideki Katayama, Terumi Nakamura, Yasuhiko Inoue, Susumu Motomura, Atsumichi Kushibe

{"title":"Effects of the Cr and Ni concentrations on the fatigue and corrosion resistances of Fe−Mn−Cr−Ni−Si alloys for seismic damping applications","authors":"Fumiyoshi Yoshinaka, Yusuke Tsutsumi, Tomoya Nagira, Susumu Takamori, Satoshi Emura, Takahiro Sawaguchi, Hideki Katayama, Terumi Nakamura, Yasuhiko Inoue, Susumu Motomura, Atsumichi Kushibe","doi":"10.2355/isijinternational.isijint-2023-437","DOIUrl":"https://doi.org/10.2355/isijinternational.isijint-2023-437","url":null,"abstract":"Previous research has shown that Fe–Mn–Cr–Ni–Si alloys offer excellent low-cycle fatigue resistance via reversible bidirectional transformation between face-centered cubic (FCC) γ-austenite and hexagonal closed-packed (HCP) ε-martensite. The alloy shows superior low-cycle fatigue life and is used for seismic damping applications, but there have been concerns over their resistance to highly corrosive environments. In this study, Fe–15Mn–aCr–bNi–4Si alloys were prepared with different Cr and Ni concentrations to evaluate the effects on the fatigue and corrosion resistances: Z1 with (a, b) = (14, 10.1), Z2 with (a, b) = (12.5, 8.8), Z3 with (a, b) = (11, 7.5), Z4 with (a, b) = (9.5, 6.1), and Z5 with (a, b) = (8, 4.8). Z2 had the longest fatigue life. The alloy showed Gibbs free energy difference between γ-austenite and ε-martensite phases close to the ideal of zero and the α′-martensitic transformation was suppressed well, which agreed with the design criteria for achieving bidirectional transformation-induced plasticity. The developed alloys showed superior corrosion resistance in seawater. Local pitting corrosion was observed that was attributed to the high Mn concentration of the alloys, although this was greatly mitigated by adjusting the Cr and Ni concentrations, especially with Z1 and Z2.\u0000","PeriodicalId":14619,"journal":{"name":"Isij International","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140148061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0