Search Results - "KARJALAINEN, L. P"

Fatigue behavior of high-Mn TWIP steels by Hamada, A.S., Karjalainen, L.P., Puustinen, J.

“…Fatigue behavior of three high-Mn TWIP steels with the grain sizes between 4.5 and 55 μm were investigated in reversed plane bending in the high-cycle regime…”
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Hot ductility behaviour of high-Mn TWIP steels by Hamada, A.S., Karjalainen, L.P.

“…▶ The hot ductility of TWIP steels is enhanced through dynamic recrystallization. ▶ Al levels need to be strictly controlled and moderate levels 1.5wt.% are…”
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The influence of aluminum on hot deformation behavior and tensile properties of high-Mn TWIP steels by Hamada, A.S., Karjalainen, L.P., Somani, M.C.

“…The influence of aluminum (0–3 wt.%) on the high-temperature flow stress and recrystallization kinetics of two austenitic 25 wt.% Mn-bearing TWIP steels were…”
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Strain hardening behavior of phase reversion-induced nanograined/ultrafine-grained (NG/UFG) austenitic stainless steel and relationship with grain size and deformation mechanism by Challa, V.S.A., Wan, X.L., Somani, M.C., Karjalainen, L.P., Misra, R.D.K.

“…The concept of phase reversion involving severe cold deformation of metastable austenite to generate strain-induced martensite, followed by temperature–time…”
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High-cycle fatigue behavior of ultrafine-grained austenitic stainless and TWIP steels by Hamada, A.S., Karjalainen, L.P.

“…High-cycle fatigue behavior of ultrafine-grained (UFG) 17Cr–7Ni Type 301LN austenitic stainless and high-Mn Fe–22Mn–0.6C TWIP steels were investigated in a…”
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On Various Aspects of Decomposition of Austenite in a High-Silicon Steel During Quenching and Partitioning by Somani, Mahesh Chandra, Porter, D. A., Karjalainen, L. P., Misra, R. D. K.

“…Using a Gleeble thermomechanical simulator, a high-silicon steel (Fe-0.2C-1.5Si-2.0Mn-0.6Cr) was laboratory hot-rolled, re-austenitized, quenched into the M s…”
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Martensite shear phase reversion-induced nanograined/ultrafine-grained Fe–16Cr–10Ni alloy: The effect of interstitial alloying elements and degree of austenite stability on phase reversion by Misra, R.D.K., Zhang, Z., Venkatasurya, P.K.C., Somani, M.C., Karjalainen, L.P.

“…▶ Development of a novel process involving phase-reversion annealing process. ▶ Austensite stability strongly influences development of nanograined structure…”
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Enhanced Mechanical Properties through Reversion in Metastable Austenitic Stainless Steels by Somani, M.C., Juntunen, P., Karjalainen, L.P., Misra, R.D.K., Kyröläinen, A.

“…A novel processing route of cold rolling and reversion annealing for enhanced mechanical properties has been investigated in metastable 17Cr-7Ni-type…”
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Nanoscale Deformation Behavior of Phase-Reversion Induced Austenitic Stainless Steels: The Interplay Between Grain Size from Nano-Grain Regime to Coarse-Grain Regime by Misra, R. D. K., Venkatsurya, P. K. C., Somani, M. C., Karjalainen, L. P.

“…We have used the recently adopted concept of phase reversion to obtain grain size from the nanograined/ultrafine-grained (NG/UFG) to fine grain (FG) regime by…”
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Interplay between grain structure and protein adsorption on functional response of osteoblasts: Ultrafine-grained versus coarse-grained substrates by Misra, R. D. K., Nune, C., Pesacreta, T. C., Somani, M. C., Karjalainen, L. P.

“…The rapid adsorption of proteins is the starting and primary biological response that occurs when a biomedical device is implanted in the physiological system…”
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Effect of Nitrogen Content on Grain Refinement and Mechanical Properties of a Reversion-Treated Ni-Free 18Cr-12Mn Austenitic Stainless Steel by Behjati, P., Kermanpur, A., Najafizadeh, A., Samaei Baghbadorani, H., Karjalainen, L. P., Jung, J. -G., Lee, Y. -K.

“…Martensite reversion treatment was utilized to obtain ultrafine grain size in Fe-18Cr-12Mn-N stainless steels containing 0 to 0.44 wt pct N. This was achieved…”
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On the Significance of Nature of Strain-Induced Martensite on Phase-Reversion-Induced Nanograined/Ultrafine-Grained Austenitic Stainless Steel by Misra, R.D.K., Nayak, S., Mali, S.A., Shah, J.S., Somani, M.C., Karjalainen, L.P.

“…We recently described the reversal of strain-induced martensite to the parent austenite phase in the attempt to produce nanograins/ultrafine grains via…”
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Ultrahigh strength martensite–austenite dual-phase steels with ultrafine structure: The response to indentation experiments by Misra, R.D.K., Venkatsurya, P., Wu, K.M., Karjalainen, L.P.

“…In medium to high carbon steels, characterized by martensite–austenite microstructure processed by quenching and partitioning process, martensite potentially…”
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Nanograined/Ultrafine-Grained Structure and Tensile Deformation Behavior of Shear Phase Reversion-Induced 301 Austenitic Stainless Steel by Misra, R.D.K., Nayak, S., Venkatasurya, P.K.C., Ramuni, V., Somani, M.C., Karjalainen, L.P.

“…We describe here an electron microscopy study of shear reversion-induced nanograined/ultrafine-grained (NG/UFG) structure and evolution of tensile strained…”
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Dependence of cellular activity at protein adsorbed biointerfaces with nano- to microscale dimensionality by Nune, C., Misra, R. D. K., Somani, M. C., Karjalainen, L. P.

“…Protein adsorption is one of the first‐few events that occur when a biomedical device comes in contact with the physiological system. The adsorption process is…”
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Nanomechanical insights into the deformation behavior of austenitic alloys with different stacking fault energies and austenitic stability by Misra, R.D.K., Zhang, Z., Jia, Z., Surya, P.K.C. Venkat, Somani, M.C., Karjalainen, L.P.

“…► Deformation mechanisms of Type 316L, 301LN, and TWIP steels were elucidated. ► Nanoindentation and electron microscopy was used to explain deformation…”
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Electrochemical corrosion behaviour of a novel submicron-grained austenitic stainless steel in an acidic NaCl solution by Hamada, A.S., Karjalainen, L.P., Somani, M.C.

“…Novel microstructures consisting of various fractions of tempered martensite, retained austenite and submicron-grained austenite were processed in an AISI…”
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Fatigue behavior of ultrafine-grained and coarse-grained Cr–Ni austenitic stainless steels by Hamada, A.S., Karjalainen, L.P., Surya, P.K.C. Venkata, Misra, R.D.K.

“…► Fatigue resistance of ultrafine-grained 301LN is highly increased by grain refinement. ► Fatigue mechanism differs distinctly from that of coarse-grained…”
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Influence of precipitation on initial high-temperature oxidation of Ti–Nb stabilized ferritic stainless steel SOFC interconnect alloy by Ali-Löytty, H., Jussila, P., Juuti, T., Karjalainen, L.P., Zakharov, A.A., Valden, M.

“…Oxidation phenomena on Laves phase forming Ti–Nb stabilized ferritic stainless steel (EN 1.4509) were studied at 650 °C by electron microscopic and electron…”
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Nanoscale deformation experiments on the strain rate sensitivity of phase reversion induced nanograined/ultrafine-grained austenitic stainless steels and comparison with the coarse-grained counterpart by Misra, R.D.K., Zhang, Z., Jia, Z., Venkatsurya, P.K.C., Somani, M.C., Karjalainen, L.P.

“…► Nanoscale deformation behavior in nanograined steel is studied. ► Nanograined steels exhibits higher strain rate sensitivity. ► Deformation in nano- and…”
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