Article
Materials Science, Multidisciplinary
Lv Jinlong, Wang Zhuqing
Summary: The study optimized the recrystallized microstructures of 316L stainless steel through twice cold rolling and reversed transformation annealing, resulting in improved strength and plasticity. The method significantly increased the strength of the stainless steel while maintaining better ductility.
Article
Materials Science, Multidisciplinary
Ehsan Norouzi, Reza Miresmaeili, Hamid Reza Shahverdi, Mohsen Askari-Paykani, Laura Maria Vergani
Summary: The effect of hydrogen on the phase transformation, deformation twins, and dislocation density of metastable stainless steel 304 was investigated. Hydrogen charging resulted in the formation of a large amount of alpha-martensite, a high density of deformation twins, and an increased dislocation density compared to the uncharged state. This caused a significant loss of ductility by 60% in the presence of hydrogen in metastable austenitic stainless steel. Alpha-martensite and twins were preferred sites for crack initiation and propagation, leading to increased susceptibility to hydrogen embrittlement.
Article
Materials Science, Multidisciplinary
Merbin John, Alessandro M. Ralls, Manoranjan Misra, Pradeep L. Menezes
Summary: This study evaluates the effect of ultrasonic impact peening (UIP) on the stress corrosion cracking (SCC) susceptibility of gas tungsten arc welded (GTAW) stainless steel (SS) components, aiming to control the SCC failure. The study found that UIP treatment induces residual compressive stresses (RCS) and severely plastically deformed (SPD) layers on the surface, resulting in improved SCC resistance. These findings suggest that UIP is a potential technique to mitigate the SCC susceptibility of austenitic-based stainless steel (ASS) weld joints in nuclear applications.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Aya Matsushita, Yoji Mine, Kazuki Takashima
Summary: The addition of nanotwin bundles in 304 metastable austenitic stainless steel enhances fatigue crack growth resistance by inhibiting brittle twin boundary separation and promoting detwinning and martensite formation during crack propagation.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Physical
Shaohua Li, Wenchun Jiang, Xuefang Xie, Zhilong Dong
Summary: Austenite and duplex stainless steels are widely used in engineering due to their excellent combination of mechanical properties and corrosion resistance. However, fatigue failure still poses a threat to their structural integrity. This study compared the cyclic deformation behavior of fully-austenitic stainless steel 316L and duplex stainless steel 2205, revealing that 2205 primarily exhibited cyclic hardening, while 316L showed additional secondary hardening at larger strain amplitudes.
Article
Chemistry, Physical
Young-Ran Yoo, Jae-Sung Kim, Young-Sik Kim
Summary: This study focused on the influence of welding and laser peening on the microstructural changes in 304L stainless steel and proposed a model for microstructural change by laser peening on welded 304L stainless steel.
Article
Chemistry, Physical
Na Gong, Tzee Luai Meng, Chee Kiang Ivan Tan, Jing Cao, Yuefan Wei, Niroj Maharjan, Dennis C. C. Tan, Huiqing Xie, Coryl J. J. Lee, R. D. K. Misra, Hongfei Liu
Summary: Single spot nanosecond laser-shock peening (LSP) was conducted on stainless steels (SS304L and SS316L) with up to 20 shots. The depth of the craters increased linearly with the number of LSP shots, at rates of -6.6 and -10.8 μm/shot on SS304L and SS316L, respectively. Micro surface spallation with outward extrusions was observed, and chemical analysis showed the presence of carbon oxides and absence of LSP-induced metal oxidation at the crater center. LSP-induced gamma-to-epsilon transformation and alpha'-martensite presence were found in the crater on SS304L, indicating e-mediated martensite transformation.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yunjian Song, Shu Huang, Jie Sheng, Emmanuel Agyenim-Boateng, Yunfeng Jiang, Qiang Liu, Mingliang Zhu
Summary: The hydrogen embrittlement resistance of 2205 duplex stainless steel treated with laser peening was investigated. Laser peening changed the morphology and distribution of the ferrite and austenite phases, altering the path of hydrogen transport and diffusion. The refined grain structure induced by laser peening increased the difficulty of hydrogen atom penetration by providing more tortuous grain boundaries. Furthermore, the beneficial microstructures induced by laser peening, such as dislocation entanglements and mechanical twins, helped trap hydrogen atoms and reduce their mobility. Hydrogen determination tests provided direct evidence of reduced hydrogen penetration. Additionally, the depth of the brittle region in the tensile fracture was inversely proportional to the laser power density, indicating that increasing laser power density can decrease the hydrogen embrittlement sensitivity of the 2205 duplex stainless steel.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Qide Zheng, Xincun Zhuang, Zhen Zhao
Summary: Experimental results showed that the flow stress of SUS304 stainless steel decreased with increasing forming temperature, while the effect of strain rate and temperature on flow stress varied. Through microstructure evolution and phase transformation analysis, key factors influencing the flow behavior of stainless steel were identified.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Jae-Kyung Han, Xiaojing Liu, Isshu Lee, Yulia O. Kuzminova, Stanislav A. Evlashin, Klaus-Dieter Liss, Megumi Kawasaki
Summary: In this study, structural evolution of additive manufactured 316L stainless steel through post-printing nanostructuring using high-pressure torsion at room temperature was investigated. The formation of a martensite phase and significant strain gradients were observed in the nanostructured austenitic steel. Early stage structural changes were attributed to lattice distortion by excess of dislocations and defects.
Article
Materials Science, Multidisciplinary
Qingjuan Wang, Zeen He, Zhongze Du, Qinren Wang, Xue Dang, Zejiang Qi, Congcong Yang
Summary: Hot compression experiments were conducted on 42CrMo steel to investigate the microstructure evolution and flow behavior under different deformation conditions. The results show that the flow curves exhibit significant peaks at low strain rates and high temperatures, with peak stress increasing at lower deformation temperatures and higher strain rates. The critical points of dynamic recrystallization (DRX) were derived from the work-hardening curves, and the relationship between peak and critical strains was determined. The softening mechanism was found to be a combination of dynamic recovery (DRV) and DRX at low temperatures, while mainly DRX at high temperatures, with coarsening of the deformed DRX grains at low strain rates.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Manufacturing
Jonghyun Jeong, Yukyeong Lee, Jeong Min Park, Dong Jun Lee, Ikgeun Jeon, Hoon Sohn, Hyoung Seop Kim, Tae-Hyun Nam, Hyokyung Sung, Jae Bok Seol, Jung Gi Kim
Summary: Rapid melting and solidification cycles in laser-based additive manufacturing lead to the formation of non-equilibrium microstructures in stainless steels, such as ultrafine 8-ferrite mediated by atomic segregation, which differ from those in casting-produced SSs. The presence of metastable ultrafine 8-ferrite in additively manufactured SSs results in a new coherent interface in the austenitic matrix. The role of the ultrafine 8-ferrite on the mechanical properties of directed energy deposition processed 304L SS was investigated by modifying the laser scan speeds and conducting electron microscopy-based characterization, demonstrating that it maintains coherency with the austenite matrix in the undeformed state and interacts with dislocations during plastic deformation. The study also found that the twin volume fraction is influenced by the initial grain size of 304L SSs, leading to differences in mechanical properties between different scan speed conditions. Through the synergetic effects of ultrafine 8-ferrite, deformation-induced twins, and twin intersections, the additively manufactured 304L SS achieved excellent ductility, showcasing the contribution of the metastable phase to prolonged plasticity in metallic alloys during plastic deformation.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Y. X. Liu, Z. Y. Liang, S. G. Xu, M. X. Huang
Summary: This study investigates the size effect on mechanical properties and microstructural evolution of an ultra-thin 304L stainless steel sheet with less than 20 grains through the thickness. It is found that the surface grains exhibit weaker strain hardening compared to the interior grains due to enhanced annihilation of statistically stored dislocations. The finite element analysis shows good agreement with experimental results.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Coatings & Films
Jizhan Wu, Peitang Wei, Huaiju Liu, Boyu Zhang, Guibao Tao
Summary: The surface integrity of components treated by shot peening is influenced by shot peening process, procedure, and machine parameters. The intensity is mainly affected by shot diameter, air pressure, and shot flow rate. With increasing intensity, the maximum compressive residual stress and surface hardness increase linearly.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Matruprasad Rout, Surjya K. Pal, Shiv Brat Singh
Summary: In this study, the microstructure evolution of austenitic stainless steel after deformation at elevated temperatures was investigated through thermo-mechanical processing. The results showed that at temperatures of 900 degrees C and 1000 degrees C, the microstructures of samples held for 2 seconds consisted of deformed grains, while the sample held at 1100 degrees C showed nearly complete recrystallization. The increase in holding time resulted in a decrease in low angle boundaries and an increase in high angle grain boundaries at all three temperatures.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Coatings & Films
Digvijay Singh, Atul M. Gatey, Rupesh S. Devan, Vinicius Antunes, Fernando Alvarez, Carlos A. Figueroa, Akshay A. Joshi, Santosh S. Hosmani
SURFACE ENGINEERING
(2019)
Article
Materials Science, Multidisciplinary
A. K. Litoria, C. A. Figueroa, L. T. Bim, C. Pruncu, A. A. Joshi, S. S. Hosmani
PHILOSOPHICAL MAGAZINE
(2020)
Article
Engineering, Mechanical
Manoj D. Joshi, Vikesh Kumar, Indrasen Singh, Santosh S. Hosmani
Summary: The study focuses on the tribological response of the severely deformed surface of AISI 316L steel specimens, showing that surface mechanical attrition treatment (SMAT) can significantly improve surface hardness, reduce wear-rate, and perform better under lubricated conditions.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Materials Science, Multidisciplinary
Digvijay Singh, Dudekula A. Basha, Alok Singh, Rupesh S. Devan, Santosh S. Hosmani
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2020)
Article
Materials Science, Coatings & Films
S. S. Mani Prabu, Chandra S. Perugu, Ashutosh Jangde, H. C. Madhu, M. Manikandan, Manoj D. Joshi, Santosh S. Hosmani, P. Ajay Kumar, Satish Kailas, I. A. Palani
SURFACE & COATINGS TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Aditya K. Litoria, Manoj D. Joshi, V. Antunes, Digvijay Singh, Carlos A. Figueroa, F. Alvarez, Santosh S. Hosmani
Summary: The study demonstrates that boronizing treatment can enhance the oxidation resistance and wear-resistance of steel, with a more significant advantage observed at higher temperatures.
PHILOSOPHICAL MAGAZINE
(2021)
Article
Materials Science, Multidisciplinary
Vikesh Kumar, Manoj D. Joshi, Catalin Pruncu, Indrasen Singh, Santosh S. Hosmani
Summary: This study explores the impact of SMAT on microstructure and tribological behavior of AISI 316L steel samples manufactured using SLM. SMAT can reduce surface roughness and eliminate internal porosity, increase hardness and wear resistance of SLM steel.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Engineering, Mechanical
Manoj D. Joshi, Ranjit A. Patil, Yuan-Ron Ma, Rupesh S. Devan, Santosh S. Hosmani
Summary: This study investigates the reciprocating wear behavior of SMAT-treated AISI 316L stainless steel with and without polymer and composite coatings. The results show that coatings can significantly reduce wear loss and coefficient of friction of both non-SMATed and SMATed steel materials.
TRIBOLOGY TRANSACTIONS
(2021)
Article
Chemistry, Physical
Digvijay Singh, Felipe Cemin, Mawin J. M. Jimenez, Vinicius Antunes, Fernando Alvarez, Dmytro Orlov, Carlos A. Figueroa, Santosh S. Hosmani
Summary: This study investigates the high-temperature oxidation behavior of nanostructure surface layered AISI 304L stainless steel. The results show that the surface mechanical attrition treatment (SMAT) process can lead to the formation of a stable and protective oxide scale with better adhesion and higher density.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Coatings & Films
Manoj D. Joshi, Nilesh K. Kumbhar, Omkar V. Rambadey, Pankaj R. Sagdeo, Rupesh S. Devan, Santosh S. Hosmani
Summary: This study investigated the effect of hexagonal boron nitride (hBN) content, exfoliation extent, and substrate conditions on the tribological performance of aromatic thermoset polymer (ATSP) coatings deposited on stainless steel. The results showed that increasing the hBN content and stirring time reduced the coefficient of friction and volume loss of the coatings. Additionally, coatings deposited on substrates with surface mechanical attrition treatment (SMAT) exhibited lower friction and enhanced durability.
SURFACE & COATINGS TECHNOLOGY
(2022)
Review
Materials Science, Multidisciplinary
Nilesh K. Kumbhar, Manoj D. Joshi, Vikesh Kumar, Santosh S. Hosmani
Summary: AZ91D, a die-casted magnesium alloy, has advantages over other alloys but cannot meet the requirements of advanced applications. Extensive research in coating technologies for enhancing AZ91D's performance in corrosive environments is crucial. This study focuses on the developments in coating materials and techniques, with emphasis on composite, biodegradable, and self-healing coatings. The transition to self-healing and environment-friendly coatings is discussed, along with the effects of additives, pre-treatments, post-treatments, and corrosion inhibitors on coating performance.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Nilesh K. K. Kumbhar, Vikesh Kumar, Digvijay Singh, Santosh S. S. Hosmani
Summary: The surface properties of the AZ91D alloy can be modified using surface mechanical attrition treatment (SMAT), and the process parameters play a crucial role in this method. In this study, specimens were treated using two different ball velocities (3 and 10 m/s), and the effects were compared. The high-velocity balls resulted in a thicker gradient layer with higher hardness and compressive residual stress. Ball velocity also influenced nanomechanical properties such as nanohardness, creep resistance, and strain rate sensitivity (SRS). The SRS value near the SMATed surface was lower but increased with depth in the SMATed layer.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Nilesh K. Kumbhar, Vikesh Kumar, Santosh S. Hosmani
Summary: This study investigates the impact of surface mechanical attrition treatment (SMAT) on the microstructure, hardness, and residual stress of Mg5Zn0.2Ca alloy. The results show that appropriate SMAT parameters can improve the performance of the alloy.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Vikesh Kumar, Catalin Iulian Pruncu, Yaping Wang, Carlos A. A. Figueroa, Indrasen Singh, Santosh S. S. Hosmani
Summary: The study investigates the impact of microstructure modifications on the corrosion, passivation, and plasma-nitriding behaviour of 316L steel. Microstructure modifications are achieved through the laser powder bed fusion (L-PBF) process and surface mechanical attrition treatment (SMAT). The results show that microstructure affects the passivation, corrosion, and nitriding behaviour of the steel.
PHILOSOPHICAL MAGAZINE
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Manoj D. Joshi, Vikesh Kumar, Aditya K. Litoria, Digvijay Singh, Santosh S. Hosmani
MATERIALS TODAY-PROCEEDINGS
(2020)
