In-situ tensile observation of a RSP Al-Li alloy in transmission electron microscope

Journal Article · Tue Feb 15 04:00:00 EST 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90603-3· OSTI ID:5385990

Zhen, L; Mao, J F; Cui, Y X; Yang, D Z ^[1]; Yu, G F; Jiao, C G; Dai, S L ^[2]

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1. Harbin Inst. of Tech. (China). Dept. of Metals and Technology
2. Beijing Inst. of Aeronautical Materials (China)

Rapid solidification technology offers several advantages over the ingot metallurgy methods when used for manufacturing Al-Li alloys. These include: (1) increasing lithium contents in excess of the practical maximum of 2.7wt% for the ingot alloys, (2) refinement of grains and secondary phases, (3) utilization of strengthening mechanisms, such as dispersion hardening, and substructure hardening. Therefore it is reasonable that RSP Al-Li alloys have more satisfactory performances than their IM counterpart. Unfortunately, this is not true, though the density is further reduced and strength is obviously improved by the increased Li contents; the ductility and toughness of RSP Al-Li alloys are even lower than that of the IM Al-Li alloys. The object of this paper is to study the fracture mechanisms in a RSP Al-Li-Mg-Cu-Zr alloy by an in-situ tensile test in a transmission electron microscope in order to explore the reasons that impede the improvement of ductility and toughness of RSP Al-Li alloys.

• OSTI ID: 5385990
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 30:4; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
DUCTILITY
FRACTURE PROPERTIES
LINE DEFECTS
LITHIUM ALLOYS
MECHANICAL PROPERTIES
TENSILE PROPERTIES