Institute of Metals Division - Effect of Stress Upon the Recovery and Effect of Negative Strain Upon the Yield Point of Zinc Single Crystals

The American Institute of Mining, Metallurgical, and Petroleum Engineers

J. V. Rinnovatore Norman Brown

Organization:: The American Institute of Mining, Metallurgical, and Petroleum Engineers
Pages:: 5
File Size:: 363 KB
Publication Date:: Jan 1, 1961

Abstract

Email to a Friend

It was found that a shear stress applied during the recovery had no effect on the amount of recovery if the stress was less than the instantaneous yield point irrespective of the direction of the stress. Large ajplied stresses during recovery had a marked effect, which depended on the direction of stressing. Single strain reversals at -72°C not only produced the Bausch-inger effect but also increased the flow stress. The increase inflow stress was attributed to vacancies, which have appreciable mobility at -72 °C. THEORIES I-' of recovery suggest that the internal stress field of the dislocations plays an essential role. Most investigations of recovery use time and temperature as the independent variables; however, here stress has been introduced as a variable in two ways: 1) by varying the internal stress field according to the amount of strain prior to recovery and 2) by applying an external stress during recovery. Tannen- baum and Kauzrnann studied the effect of applying a stress during recovery by measuring the change in creep rate after recovery; they found that stresses as high as 95 pct of the creep stress had no effect on recovery. Earlier, Wood and scrutton6 showed that an applied stress during creep increased the rate of poly-gonization. The experiment by Wood involved poly-crystalline aluminum whereas Tannenbaum and Kauzmann used a single crystal of zinc. In this investigation, zinc single crystals were used and deformed in a manner to prevent polygonization. Thus, the main difference between this investigation and that of Tannenbaum and Kauzmann is the use of the stress-strain curve instead of creep rate as the index of recovery. In addition, the applied stress during recovery varied

Citation

APA: J. V. Rinnovatore Norman Brown (1961) Institute of Metals Division - Effect of Stress Upon the Recovery and Effect of Negative Strain Upon the Yield Point of Zinc Single Crystals

MLA: J. V. Rinnovatore Norman Brown Institute of Metals Division - Effect of Stress Upon the Recovery and Effect of Negative Strain Upon the Yield Point of Zinc Single Crystals. The American Institute of Mining, Metallurgical, and Petroleum Engineers, 1961.

Export

CSV

RIS

Purchase this Article for $25.00

Create a Guest account to purchase this file
- or -
Log in to your existing Guest account

Unexpected error retrieving advertisement for PageView: Home_Index, Key: SidebarTop Name : Microsoft.Data.SqlClient.SqlException Message: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 0 - An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full.) Stack : at Microsoft.Data.ProviderBase.DbConnectionPool.CheckPoolBlockingPeriod(Exception e) at Microsoft.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) at Microsoft.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) at Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) at Microsoft.Data.ProviderBase.DbConnectionPool.WaitForPendingOpen() --- End of stack trace from previous location --- at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenInternalAsync(Boolean errorsExpected, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenInternalAsync(Boolean errorsExpected, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenAsync(CancellationToken cancellationToken, Boolean errorsExpected) at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReaderAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.AsyncEnumerator.InitializeReaderAsync(AsyncEnumerator enumerator, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.AsyncEnumerator.MoveNextAsync() at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.SingleOrDefaultAsync[TSource](IAsyncEnumerable`1 asyncEnumerable, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.SingleOrDefaultAsync[TSource](IAsyncEnumerable`1 asyncEnumerable, CancellationToken cancellationToken) at OneMine.Advertisements.Data.Queries.AdvertisementQueries.GetActiveAdvertisementByNameKeyAsync[T](Guid siteId, String pageViewName, String placementKey, CancellationToken cancellationToken) in D:\a\1\s\Lib\Data\Advertisements\Data\Queries\AdvertisementQueries.cs:line 39 at OneMine.Web.ViewComponents.ZoneTagViewComponent.InvokeAsync(String pageViewName, String placementKey) in D:\a\1\s\Web\ViewComponents\ZoneTagViewComponent.cs:line 84 -- Inner Exception -- Name : System.ComponentModel.Win32Exception Message: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full. Stack :