Title

The Effects Of Strain Rate And Hydrogen Content on the Low Temperature Deformation Behavior Of Columbium

Date

1961

Index Abstract

Contrails and DTIC

Photo Quality

Incomplete

Report Number

WADD TR 61-44

Creator

Wilcox, B. A.

Klinger, R. F.

Brisbane, A.W.

Corporate Author

Metals and Ceramics Laboratory

Laboratory

Metals and Ceramics Laboratory

Extent

32

Identifier

AD0264858

AD0264858

Access Rights

OTS

Distribution Classification

1

Contract

Laboratory Research - No Contract

DoD Project

7351 - Metallic Materials

DoD Task

73521

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

None

Abstract

The strain rate and temperature dependencies of the low temperature deformation behavior of fine grained arc-melted columbium, 1 part per million hydrogen (1 ppm hydrogen) were evaluated for tensile strain rates of 0.005, 0.10 and 6.0 in/in/min. The effect of hydrogen content (1, 9, and 30 ppm H) on the mechanical behavior was also investigated in the temperature range 25 to -195°C, using a tensile strain rate of 0.005/min.

The existence of a hydrogen-dislocation interaction in columbium was confirmed by: (1) calculation of an apparent activation energy for the early stages of low temperature deformation; (2) observation of a hydrogen induced strain aging peak at -50°C, for columbium containing 30 ppm H; and (3) observation of a serrated stress-strain curve at 25°C in coarse grained columbium containing 89 ppm H.

Report Availability

Full text available

Date Modified

Scanned by request 2/13/2004 submitted by Pratt & Whitney Space Propulsion (Aerospace Industry - Domestic)

Date Issued

1961-05

Publisher

Wright-Patterson Air Force Base, OH : Aeronautical Systems Division, Air Force Systems Command, United States Air Force Base

Distribution Conflict

No

Provenance

IIT

Type

report

Subject

Niobium

Refractory Materials

Deformation

Aging (Physiology)

Fracture (Mechanics)

Hydrogen

Hydrogen Embrittlement

Impurities

Cryogenics

Mechanical Properties

Metals

Stresses

Temperature

Tensile Properties

Transition Temperature

Format

1 online resource