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Grain growth in austenitic stainless steels
Metallography, 1978Recent studies on the sintering of 304L stainless steel powder compacts showed an intimate coupling of the grain growth and densification processes. The effect was particularly dominant in the intermediate stage of sintering in which the pore structure became rounded, temperatures in excess of 1330K, and times in excess of one hour.
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Advanced Engineering Materials, 2015
A novel type of nanotwinned austenitic stainless steel consisting of the nanotwinned grains embedded in coarsened nano‐sized grains and recrystallized matrix was synthesized. Potentiodynamic polarization measurements indicate that the nanotwinned samples exhibit a higher passive ability in the acidic solution and a comparable pitting resistance in ...
Fengkai Yan +3 more
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A novel type of nanotwinned austenitic stainless steel consisting of the nanotwinned grains embedded in coarsened nano‐sized grains and recrystallized matrix was synthesized. Potentiodynamic polarization measurements indicate that the nanotwinned samples exhibit a higher passive ability in the acidic solution and a comparable pitting resistance in ...
Fengkai Yan +3 more
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Work hardening behavior of nanotwinned austenitic grains in a metastable austenitic stainless steel
Scripta Materialia, 2016Abstract The work hardening behavior of nanotwinned austenitic grains in a novel type of nanotwinned austenitic stainless steels was investigated. Multiple Shockley partial dislocation activities in the nanotwinned grains could trigger occurrence of stacking faults and strain induced martensitic transformation before necking, resulting in an increase
H.Y. Yi, F.K. Yan, N.R. Tao, K. Lu
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The Effect of Austenitizing Temperature on Prior Austenite Grain Size in Martensitic Cast Steel
Solid State Phenomena, 2013The GX12CrMoVNbN9-1 (GP91) cast steel belongs to a new group of high-temperature creep resistant cast steels being introduced to the power industry. The cast steel is characterized by higher mechanical properties in comparison with the low alloy Cr – Mo or Cr – Mo – V cast steels used so far.
Grzegorz Golański +2 more
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Austenite grain growth kinetics and the grain size distribution
2009The aims of this work are to assess the kinetics of austenite grain growth, and to estimate the three dimensional grain size distribution. Measurements are to be used for the validation of a statistical model for the estimation of the kinetics of austenite grain growth during hot strip rolling.
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Metallurgical Transactions A, 1991
A 0.06 pct C-0.3 pct Mn and a 0.07 pct C-0.6 pct Mn-0.028 pct Nb steel were deformed in torsion at a constant strain rate of 2/s. Two schedules were used. In schedule A, seven roughing passes executed between 1260°C and 1130°C were followed by a single large finishing pass with a strain of 3.5 at constant temperatures between 1010°C and 840°C. The time
J. W. Bowden, F. H. Samuel, J. J. Jonas
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A 0.06 pct C-0.3 pct Mn and a 0.07 pct C-0.6 pct Mn-0.028 pct Nb steel were deformed in torsion at a constant strain rate of 2/s. Two schedules were used. In schedule A, seven roughing passes executed between 1260°C and 1130°C were followed by a single large finishing pass with a strain of 3.5 at constant temperatures between 1010°C and 840°C. The time
J. W. Bowden, F. H. Samuel, J. J. Jonas
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Spreading of Extrinsic Grain Boundary Dislocations in Austenitic Steel
Physica Status Solidi (a), 1979The dependence of the spreading process of extrinsic grain boundary dislocations (EGBD's) on grain boundary state and misorientation, and spreading kinetics in austenitic steel is investigated. Spreading of EGBD's at non-equilibrium grain boundaries obtained by successive cold rolling and annealing treatments at a temperature much lower than 0.8Tm is ...
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Stem imaging of prior austenite grain boundaries
Scripta Materialia, 2000The problem of temper embrittlement of low-alloy steels used in steam-turbine generators was thought to have been solved by the introduction of clean steels with low levels of certain impurities. However, even these steels exhibit temper embrittlement at turbine operation temperatures >400 C. Initial studies of temper embrittlement of clean steels used
Adam J Papworth, David B Williams
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Grain boundary chromium depletion in austenitic alloys
Journal of Materials Science, 2010It is widely accepted that thermally induced grain boundary chromium depletion in austenitic alloys such as austenitic stainless steels and Ni base alloys can lead to inter-granular stress corrosion cracking (IGSCC) of high temperature components during service.
Youfa Yin +4 more
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Dislocation configurations through austenite grain misorientations
International Journal of Fatigue, 2015In the present investigation, many strain controlled low cycle fatigue experiments of metastable austenitic stainless steel were performed at various total strain amplitudes under ambient temperature where the strain rate was kept constant. Dislocation cell developed due to strain cycling was measured through extensive analytical transmission electron ...
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