DIRECTIONALITY OF STRENGTH AND TOUGHNESS IN ALUMINUM-LITHIUM PLATE

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Authors
  1. Morrison, J.
  2. Zhai, Z.
  3. KarisAllen, K.J.
Corporate Authors
Defence Research Establishment Pacific, Victoria BC (CAN);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The high stiffness and low density of lithium-containing aluminum alloys make them prime candidates for a number of civil and defence aircraft applications, notably in the fuselage of the EH101 helicopter. The Defence Research Establishment Pacific is evaluating various aluminum-lithium alloys in a variety of product forms. The paper describes a study of the variation of strength and toughness with specimen orientation relative to the rolloing direction in aluminum-lithium plate. Differences in tensile properties through the plate thickness have also been examined. Fracture toughness has been measured in the short-transverse loading direction as well as in directions within the rolling plane. Comparison have been made with conventional aerospace aluminum alloys as part of an assessment of the damage tolerance implications of aluminum-lithium exploitation.
Keywords
Al-Li alloys
Report Number
DREP-93-1-PAP-13 — CONTAINED IN DSIS 94-03057
Date of publication
01 Nov 1993
Number of Pages
18
DSTKIM No
94-03044
CANDIS No
141645
Format(s):
Document Image stored on Optical Disk;Originator's fiche received by DSIS

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