Article
Materials Science, Multidisciplinary
Monica C. R. Guimaraes, Joao B. Fogagnolo, Jose M. Paiva, Stephen C. Veldhuis, Anselmo E. Diniz
Summary: Nickel-based alloys are widely used in aerospace components and the oil and gas industry. However, their machining is challenging due to their characteristics. This study evaluates the influence of tool geometry, feed rate, and cutting speed on the surface integrity of Inconel 625 cladding milling process. The results show that cutting speed has the greatest impact on specific cutting pressure, and both cutting speed and feed rate affect the thickness of the deformed layer. The surface and subsurface alterations caused by mechanical-thermal loadings have beneficial effects on corrosion resistance and compressive residual stress.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Marine
M. Hashemzadeh, Y. Garbatov, C. Guedes Soares
Summary: This study investigates the welding-induced residual stresses and distortions of butt-welded non-corroded and corroded steel plates, taking into account environmental conditions and material properties. The importance of considering steel ageing in the repair process is highlighted, and the developed methodology allows for critical operational decisions to be made with greater ease and confidence. Different welding sequence scenarios can also be analysed to minimize repair costs in repairing ageing structures.
Article
Optics
Ruolin Wu, Yu Huang, Youmin Rong, Jiajun Xu, Quan Chen
Summary: A complete solid phase transformation model was proposed to accurately predict the welding-induced residual stress and strain of high strength steel thick plate EH40 butt joint in single-pass full penetration laser welding, which showed significant effects on the stress and strain distribution. The results of this study provide valuable insights for understanding the evolution mechanism of stress and strain in the later stage of cooling stage.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Songsong Guo, Liangbo Sun, Jian Fang, Zhen Zheng, Jie Zhang, Yue Wen, Tipeng Shan, Chunfeng Liu
Summary: In this study, different shapes of Mo interlayer were designed to relieve the residual stress in a Si3N4/316L joint. It was found that the Mo interlayer designed with half-cylindrical slotting could effectively reduce the residual stress in Si3N4 substrate by shifting the maximum residual stress to the 316L substrate. The formation of Ag based solid solution in the seam further reduced the maximum residual stress in Si3N4. Moreover, when using Mo/Ag as a composite interlayer, the corrosion resistance of the joint was improved by changing the corrosion mechanism.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Coatings & Films
Ewa Jonda, Leszek Latka, Marcin Godzierz, Artur Maciej
Summary: Magnesium alloys are widely used in various industries due to their low density and high strength to weight ratio, but limited by their poor wear and corrosion behavior. In this study, commercial powders of WC-Co and WC-Cr3C2-Ni were thermally sprayed onto magnesium alloy substrates (AZ31 and AZ91) using HVOF spraying. The coatings were analyzed for microstructure and corrosion resistance. The results showed that the coatings had a dense microstructure with typical porosity for HVOF sprayed coatings, and small cracks and unmelted carbide particles were observed. The corrosion resistance of the magnesium alloys was improved by all coatings, with WC-Co providing better protection than WC-Cr3C2-Ni.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Hongwei Zhang, Liangjin Gui, Qi Wang, Zijie Fan, Jian Li
Summary: This paper presents a new approach to predict residual stresses caused by welding, considering the effects of material filling and phase transformation. The results show that without material filling, residual stress is underestimated, and without phase transformation, certain stresses are either underestimated or overestimated in different regions.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Rajesh Yadav, Ankur Kumar, Gajanan P. Chaudhari, A. G. Paradkar
Summary: The 5059H116 alloy welded by friction stir welding (FSW) showed superior corrosion resistance, while the gas metal arc welding (GMAW) sample had a shorter time to failure due to factors such as chemical heterogeneities and the presence of micro-porosity.
Article
Engineering, Mechanical
Victor Okenyi, Shukri Afazov, Neil Mansfield, Martin Alexander Eder, Asger Bech Abrahamsen, Soren Faester, Christopher Gottlieb Klingaa, Petros Siegkas, Mahdi Bodaghi
Summary: This study employed a novel corrosion-based fatigue model to assess the fatigue life of offshore welded structures. The model incorporated a corrosion factor concept to consider the influence of corrosion pits on the fatigue performance. By characterizing the parameters of the pits, fatigue S-N curves were predicted and compared with experimental data. This approach has the potential to be used for remaining life assessment of offshore structures.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Engineering, Marine
Zhongyuan Feng, Ninshu Ma, Seiichiro Tsutsumi, Xinjie Di
Summary: The heat dissipation and thermal expansion coefficient of LTT weld metal significantly affect residual stress, with smaller plate width leading to greater compressive residual stresses and a lower Ms temperature resulting in greater compressive residual stresses in the LTT weld. Increasing plate width mainly affects longitudinal residual stress, while increasing plate thickness influences all residual stress components in the LTT weld.
Article
Engineering, Mechanical
Ayhan Ince
Summary: The fatigue damage assessment of welded structures is crucial in engineering design. The HFMI technique can induce compressive residual stresses into welded joints, improving their fatigue life. The proposed crack propagation modeling approach considers residual stress fields and crack closure effects, showing potential for accurate life predictions under different conditions.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Engineering, Mechanical
Long Hu, Xixian Li, Wenze Luo, Suo Li, Dean Deng
Summary: The welded joints of low-alloy ultra-high strength (UHS) quenched steels with a yield strength of 1500 MPa exhibit solid-state phase transformation (SSPT) and softening effect. In this study, a UHS single-pass butt-welded joint was fabricated and various measurements were carried out. A novel softening model was proposed and an advanced computational approach considering thermal-metallurgical-mechanical coupling behavior was developed. The simulated results showed good agreement with the experimental data and indicated that SSPT significantly influenced the longitudinal residual stress, while the softening effect had a dramatic influence on the peak value of longitudinal residual stress in the SCHAZ.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
H. Heyraud, C. Mareau, F. Lefebvre, P. Amuzuga, R. Hauteville, F. Morel, L. Jubin, D. Bellett, T. Leblanc
Summary: This study investigates the influence of a proof load on the fatigue resistance of welded structures. Fatigue tests are conducted on arc welded stiffeners made of S355 steel under as-welded and proof-loaded conditions. X-ray diffraction analyses are used to evaluate the residual stress field. A numerical approach based on elasto-plastic finite element analyses is proposed to understand the role of a proof load on mechanical fields. The comparison between experimental and numerical results suggests that residual stress and strain hardening effects contribute to the beneficial effect of a proof load on fatigue resistance.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Industrial
Fujun Cao, Guoqiang Huang, Wentao Hou, Ruiyang Ni, Tao Sun, Jinpeng Hu, Yifu Shen, Adrian P. Gerlich
Summary: This paper investigates the application of submerged friction stir welding (SFSW) on SAF2507 super duplex stainless steel (SDSS). The results show that SFSW can achieve an ultrafine grained (UFG) dual-phase microstructure, leading to enhanced strength, elongation, and corrosion resistance in the weld joint.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Zhongyuan Feng, Ninshu Ma, Seiichiro Tsutsumi, Fenggui Lu
Summary: The study found that LTT welding materials induce greater tensile residual stress in the flange plate during multi-pass welding due to the lower reheat temperature of LTT weld pass. This transformation of residual stress may affect the suitability of LTT welding materials for multi-pass welding processes.
Article
Materials Science, Coatings & Films
Rui Shu, Hao Du, Grzegorz Sadowski, Megan M. Dorri, Johanna Rosen, Mauricio A. Sortica, Daniel Primetzhofer, Daniel Lundin, Arnaud le Febvrier, Per Eklund
Summary: Multicomponent TixNbCrAl nitride films were deposited on Si(100) substrates by using dcMS and HiPIMS techniques without substrate heating and bias. The films showed differences in crystal structure, compressive stress, and density, leading to variations in surface morphology and microstructure between the two techniques.
SURFACE & COATINGS TECHNOLOGY
(2021)