Results 191 to 200 of about 6,994 (255)
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Austenitic solidification mode in austenitic stainless steel welds
Metallurgical Transactions A, 1979The micro- and macrostructures of about 50 different stainless welds of the AISI/AWS 300 series are analyzed. The results indicate that in welding condition corresponding to a typical SMA welding those and only those welds in which the ratio Creq/Nieq≲1.48, where Nieq and Creq are the nickel and chromium equivalents on the Schaeffler diagram, solidify ...
T. Takalo, N. Suutala, T. Moisio
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Strengthening austenitic steels by using nanotwinned austenitic grains
Scripta Materialia, 2012Abstract A novel strategy for strengthening austenite steels is introduced by using the unique strengthening effect of nanoscale twins. Austenite grains containing multiple nanoscale twins can be strengthened to a yield strength of a few GPa with very high work-hardening rates.
K. Lu, F.K. Yan, H.T. Wang, N.R. Tao
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Formation of austenite from a mixture of bainitic ferrite and austenite
Materials Chemistry and Physics, 1993Abstract In this work, the isothermal reaustenitization on a chemically homogeneous weld metal has been investigated with the purpose of studying the general trend of the kinetics. For this reheated weld metal, bainitic ferrite can form from small-grain austenite.
J.R. Yang, C.Y. Huang
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Materials Science and Technology, 2020
Formation of Laves phase in creep strength enhanced ferritic steel is investigated using re-austenitization and tempering treatment. The as-received material is exposed to 620°C for 4560 h aging, and then re-austenitizated at 1050°C for 1 h, and followed
N. Saini +4 more
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Formation of Laves phase in creep strength enhanced ferritic steel is investigated using re-austenitization and tempering treatment. The as-received material is exposed to 620°C for 4560 h aging, and then re-austenitizated at 1050°C for 1 h, and followed
N. Saini +4 more
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Tensile ductility of nanotwinned austenitic grains in an austenitic steel
Scripta Materialia, 2014Dynamic plastic deformation followed by recovery annealing of an austenitic stainless steel results in the formation of a hierarchical microstructure consisting of nanotwinned austenitic grains (>55 vol.%) mixed with nanograins and dislocation structures.
F.K. Yan, N.R. Tao, K. Lu
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Materialia, 2019
Besides the chemical gradient, electropulsing treatment (EPT) produces a temperature gradient and an electric field to drive the austenitization, making it difficult for the traditional model to illustrate the transformation during EPT.
Chao Wu +4 more
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Besides the chemical gradient, electropulsing treatment (EPT) produces a temperature gradient and an electric field to drive the austenitization, making it difficult for the traditional model to illustrate the transformation during EPT.
Chao Wu +4 more
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Austenite grain growth in alumina-forming austenitic steel
Journal of Materials Research, 2016Abstract
Qiuzhi Gao +3 more
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Materials Science & Engineering: A, 2019
This study discusses contact heating of blanks as a time- and cost-saving alternative to conventional heating in radiation furnaces for press hardening of high-strength car body elements.
O. Grydin +6 more
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This study discusses contact heating of blanks as a time- and cost-saving alternative to conventional heating in radiation furnaces for press hardening of high-strength car body elements.
O. Grydin +6 more
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2007
Abstract The first step in the hardening of steel is getting it hot enough to form austenite, from which martensite can form upon quenching. Not all steels have the same austenitization requirements, however. High-carbon wear-resistant steels, such as bearing and tool steels, require the presence of carbides during austenitization; plain
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Abstract The first step in the hardening of steel is getting it hot enough to form austenite, from which martensite can form upon quenching. Not all steels have the same austenitization requirements, however. High-carbon wear-resistant steels, such as bearing and tool steels, require the presence of carbides during austenitization; plain
openaire +1 more source