Title

An Experimental Evaluation of the Mechanical Response Characteristics of Rene 95

Date

1980

Index Abstract

Coming Soon

Photo Quality

Complete

Report Number

AFWAL TR 80-4136

Creator

Stouffer, D. C.

Bernstein, H. L.

Paperni, L.

Corporate Author

University of Cincinnate

Laboratory

Materials Laboratory

Date Issued

1980-10-01

Extent

76

Identifier

ADA094466

Access Rights

Approved for Public Release; Distribution Unlimited

Distribution Classification

1

Contract

F33615-78-C-5199

DoD Project

2307

DoD Task

2307P1

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Date Modified

Scanned by request 3/30/2007 submitted by Kanchanbagh (Government Agency - International)

Abstract

The mechanical responses of thermomechanically processed cast and wrought Rene 95 at 650C (1200 F) was studied. The experimental program included: tensile and compressive tests at different constant strain rates, creep in tension at and compression at twelve stress levels, strain recovery, stress relaxation, creep response to a sequence of step stress histories and fatigue under load control. The results are important for the understanding of the material response characteristics and for the development of a realistic constitutive model. Most of the tests were done in tension and data was used to evaluate various constitutive assumptions. It was shown that the engineering stress-strain response is relatively insensitive to changes in strain rate at rates above 5%/min. It was also shown that the compressive stress-strain response is about 10% stiffer than the tensile response and the minimum creep rate in compression. The hysteresis loop developed a mean tensile strain. It was found that the logarithm of the minimum creep rate is linear in the true stress and that creep and stress relaxation can be correlated using isochronous creep curves. The minimum creep rate is also independent of step changes in the stress history.

Report Availability

Full text available

Provenance

IIT

Type

report

Format

1 online resource