The use of a bree simulation to investigate strain accumulation in 316 stainless steel at temperatures between room temperature and 500°c

1989 ◽  
Vol 24 (2) ◽  
pp. 95-102 ◽  
Author(s):  
D J Brookfield ◽  
D N Moreton
Keyword(s):  
Stainless Steel ◽  
Transition Temperature ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Cyclic Change ◽  
Strain Accumulation ◽  
Temperature Behaviour ◽  
Design Rules ◽  
Axial Tension ◽  
Applied Stresses

This paper details tests undertaken to determine the 1 per cent strain accumulation boundary in stainless steel type 316 strip subjected to constant axial tension and a cyclic change of curvature. Boundaries are obtained for temperatures between 300 and 500°C. These are compared with two design rules, both of which are shown to be conservative. Additionally, the temperature at which the transition from the characteristic room temperature behaviour of continued ratchetting to the ‘shakedown’ observed at elevated temperatures is investigated. Results obtained indicate that this transition temperature is influenced by the magnitude of the applied stresses.

A Radiotracer Study of Cs+ and Cl- Deposition on Steels and Zircaloy-2 in Alkaline Water Systems

1963 ◽  
Vol 2 (1) ◽  
Author(s):  
E. Hesford ◽  
Miss J. Williams ◽  
G. N. Walton
Keyword(s):  
Stainless Steel ◽  
Oxide Film ◽  
Mild Steel ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Chloride Ion ◽  
Water Systems ◽  
Alkaline Water ◽  
Electrode Potentials ◽  
Radiotracer Study

SummaryA radiotracer study was made of caesium and chloride ion deposition on mild steel, premagnetited mild steel, stainless steel and zircaloy-2 specimens under oxidising conditions at room temperature and oxygenfree conditions at room temperature and 60° C. The results show that under any of the conditions examined uptake on stainless steel and zircaloy is low. With mild steel uptake is only low when the surface is premagnetited, and exposed to deoxygenated water at elevated temperatures. Results for anion deposition are interpreted with reference to the electrode potentials of the surfaces. Cation deposition is unrelated to electrode potentials and appears to be associated with the hydrous character of the oxide film.

Dynamic Observation of Dislocation Movements at Elevated Temperatures Using a Heating and Straining Stage

1971 ◽  
Vol 29 ◽  
pp. 108-109
Author(s):  
Y. Ishida ◽  
F. Moritoh
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Steel Tube ◽  
Deformation Mechanisms ◽  
Stainless Steel Tube ◽  
Specimen Holder ◽  
Dynamic Observation ◽  
Temperature Deformations

Dynamic observation of dislocation movements is a direct means of examining proposed deformation mechanisms. Room temperature deformations have been observed dynamically by various authors, but at elevated temperatures no observation has been reported. Various dislocation theories have been proposed on the creep mechanism of metals at elevated temperatures. They disagree to each other even in the basic eharacteristics of the dislocation movements. The dislocation may move either individually or as a group. The motion may be either smooth or intermittent. The dynamic observation is suitable to resolve those basic conflicts.A heating-straining goniometer stage (Fig. 1) was developed for the experiment. It was mounted in a Hitachi 200KV electron microscope. The foil is pasted between A areas and heated indirectly by a furnace B through a stainless steel tube C. A rapid drying paste Aron α was used in the present experiment. The tube C surrounds the top of the specimen holder.

SPECIAL GENCO

Alloy Digest ◽  
1965 ◽  
Vol 14 (2) ◽  
Keyword(s):  
Stainless Steel ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
High Strength ◽  
Heat Treating ◽  
Steel Company ◽  
Temperature Range ◽  
Temperature Performance ◽  
Corrosion And Oxidation ◽  
Chromium Stainless Steel

Abstract Special Genco is a hardenable 12% chromium stainless steel developed for applications requiring superior strength to Type 403 stainless steel at elevated temperatures. This grade retains high strength and exhibits excellent ductility over the temperature range from room temperature to 1200 F. Special Genco provides excellent resistance to corrosion and oxidation within this temperature range. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-165. Producer or source: Latrobe Steel Company.

scholarly journals Stability of Stainless Steel I-Section Beam-Columns at Elevated Temperatures

2020 ◽  
pp. 2150037
Author(s):  
Merih Kucukler ◽  
Zhe Xing ◽  
Leroy Gardner
Keyword(s):  
Stainless Steel ◽  
Elevated Temperatures ◽  
Steel Beam ◽  
Design Rules ◽  
Beam Columns ◽  
Parametric Studies ◽  
In Fire ◽  
Improved Accuracy ◽  
Rules Set ◽  
Fire Design

With the growing use of stainless steel in the construction and offshore industries, there is an increasing interest and need to study the performance of stainless structures at elevated temperatures. The behavior and design of stainless steel I-section beam-columns in fire is investigated in this paper, addressing a scarcity of previous research on this topic. Finite element (FE) models of stainless steel beam-columns, able to replicate their response at elevated temperatures, are created and validated; the validated models are then used to perform parametric studies to generate extensive benchmark structural performance data. The design rules set out in the European structural steel fire design standard EN 1993-1-2 are assessed and shown to provide rather inaccurate and often unsafe ultimate strength predictions for stainless steel I-section beam-columns in fire. New fire design rules for stainless steel beam-columns are put forward. It is shown that the new proposals are able to offer improved accuracy and design efficiency relative to the EN 1993-1-2 beam-column design rules. The reliability of the proposed design rules is also verified on the basis of the fire design reliability criteria set out by Kruppa [Eurocodes–Fire parts: Proposal for a methodology to check the accuracy of assessment methods, CEN TC 250, Horizontal Group Fire, Document no: 99/130 (1999)], thereby demonstrating the suitability of the proposed design rules for inclusion in the upcoming revised version of EN 1993-1-2.

Creep of a niobium beryllide, Nb2Be17

1993 ◽  
Vol 8 (4) ◽  
pp. 757-763 ◽  
Author(s):  
T.G. Nieh ◽  
J. Wadsworth ◽  
T.C. Chou ◽  
D. Owen ◽  
A.H. Chokshi
Keyword(s):  
Low Temperatures ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Hardness Test ◽  
Transient Creep ◽  
Test Results ◽  
Creep Properties ◽  
Dislocation Glide ◽  
Applied Stresses ◽  
Hot Hardness

A niobium beryllide, Nb2Be17, has been prepared by powder-metallurgy techniques and the mechanical properties characterized both at room and elevated temperatures. Microhardness and fracture toughness were measured at room temperature. Hardness and hot-hardness test results indicated that, although the material was brittle at low temperatures, it became plastic at elevated temperatures (>1000 °C). Creep properties of Nb2Be17 were studied at temperatures from 1250 to 1350 °C and applied stresses from 10 to 90 MPa. The stress exponent, determined from stress-change tests, was about 3, and the activation energy, determined from temperature-change tests, was about 575 kJ/mol. The creep of Nb2Be17 at high temperature is apparently controlled by dislocation glide; this proposal was supported by transient creep experiments. Comparisons have been made between the creep properties of Nb2Be17 and other intermetallics.

Mechanical Properties and Dislocation Structure of Single Crystal Cdte Deformed in Compression at 300°C

1976 ◽  
Vol 34 ◽  
pp. 592-593
Author(s):  
Ernest L. Hall ◽  
J. B. Vander Sande
Keyword(s):  
Mechanical Properties ◽  
Single Crystal ◽  
Dislocation Structure ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Strain Curve ◽  
Optical Devices ◽  
Semiconductor Compound ◽  
Wide Range ◽  
Sample Orientation

The present paper describes research on the mechanical properties and related dislocation structure of CdTe, a II-VI semiconductor compound with a wide range of uses in electrical and optical devices. At room temperature CdTe exhibits little plasticity and at the same time relatively low strength and hardness. The mechanical behavior of CdTe was examined at elevated temperatures with the goal of understanding plastic flow in this material and eventually improving the room temperature properties. Several samples of single crystal CdTe of identical size and crystallographic orientation were deformed in compression at 300°C to various levels of total strain. A resolved shear stress vs. compressive glide strain curve (Figure la) was derived from the results of the tests and the knowledge of the sample orientation.

Spherulite Structures in a Melt Spun Fe-Ni Austenitic Steel

1985 ◽  
Vol 43 ◽  
pp. 52-53
Author(s):  
G. M. Michal ◽  
T. K. Glasgow ◽  
T. J. Moore
Keyword(s):  
Austenitic Steel ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Large Range ◽  
Amorphous Structure ◽  
Nucleation And Growth ◽  
Ni Alloys ◽  
Melt Spun ◽  
Crystal Fibers ◽  
Rapidly Solidified

Large additions of B to Fe-Ni alloys can lead to the formation of an amorphous structure, if the alloy is rapidly cooled from the liquid state to room temperature. Isothermal aging of such structures at elevated temperatures causes crystallization to occur. Commonly such crystallization pro ceeds by the nucleation and growth of spherulites which are spherical crystalline bodies of radiating crystal fibers. Spherulite features were found in the present study in a rapidly solidified alloy that was fully crysstalline as-cast. This alloy was part of a program to develop an austenitic steel for elevated temperature applications by strengthening it with TiB2. The alloy contained a relatively large percentage of B, not to induce an amorphous structure, but only as a consequence of trying to obtain a large volume fracture of TiB2 in the completely processed alloy. The observation of spherulitic features in this alloy is described herein. Utilization of the large range of useful magnifications obtainable in a modern TEM, when a suitably thinned foil is available, was a key element in this analysis.

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