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Title: Influence of aging on the impact fracture behavior of a RSP Al-Li alloy

Abstract

In recent years, there has been a growing interest in the development of Al-Li alloys for aerospace applications due to their high specific strength and elastic modulus. One important trend in manufacturing Al-Li alloys is the usage of rapid solidification processing (RSP), which offers several advantages over the ingot metallurgy methods. Therefore, it is a reasonable assumption that RSP Al-Li alloys have more satisfactory performance than their IM counterpart. The size of grains was indeed refined by RSP, but the tensile fracture mode of aged RSP Al-Li alloys was essentially intergranular fracture, and their ductility was even lower than that of the IM Al-Li alloys. The easily formed precipitation free zones (PFZs) in RSP Al-Li alloys area, the effect of microstructure on the impact fracture mode and on the impact properties of RSP Al-Li alloys is seldom studied. This paper investigates the influence of aging on the impact fracture behavior of a RSP Al-Li alloy, in order to explore its fracture mechanism upon an impact load, and the effect of prior powder boundaries on mechanical properties of the alloy.

Authors:
; ; ;  [1]; ;  [2]
  1. (Harbin Inst. of Technology (China). Dept. of Metals and Technology)
  2. (Beijing Inst. of Aeronautical Materials (China))
Publication Date:
OSTI Identifier:
5227778
Resource Type:
Journal Article
Journal Name:
Scripta Metallurgica et Materialia; (United States)
Additional Journal Information:
Journal Volume: 30:5; Journal ID: ISSN 0956-716X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM BASE ALLOYS; AGING; FRACTURE PROPERTIES; LITHIUM ALLOYS; STATIC LOADS; ALLOYS; ALUMINIUM ALLOYS; MECHANICAL PROPERTIES; 360103* - Metals & Alloys- Mechanical Properties; 360102 - Metals & Alloys- Structure & Phase Studies

Citation Formats

Zhen, L., Sun, S.W., Cui, Y.X., Yang, D.Z., Yu, G.F., and Jiao, C.G. Influence of aging on the impact fracture behavior of a RSP Al-Li alloy. United States: N. p., 1994. Web. doi:10.1016/0956-716X(94)90424-3.
Zhen, L., Sun, S.W., Cui, Y.X., Yang, D.Z., Yu, G.F., & Jiao, C.G. Influence of aging on the impact fracture behavior of a RSP Al-Li alloy. United States. doi:10.1016/0956-716X(94)90424-3.
Zhen, L., Sun, S.W., Cui, Y.X., Yang, D.Z., Yu, G.F., and Jiao, C.G. Tue . "Influence of aging on the impact fracture behavior of a RSP Al-Li alloy". United States. doi:10.1016/0956-716X(94)90424-3.
@article{osti_5227778,
title = {Influence of aging on the impact fracture behavior of a RSP Al-Li alloy},
author = {Zhen, L. and Sun, S.W. and Cui, Y.X. and Yang, D.Z. and Yu, G.F. and Jiao, C.G.},
abstractNote = {In recent years, there has been a growing interest in the development of Al-Li alloys for aerospace applications due to their high specific strength and elastic modulus. One important trend in manufacturing Al-Li alloys is the usage of rapid solidification processing (RSP), which offers several advantages over the ingot metallurgy methods. Therefore, it is a reasonable assumption that RSP Al-Li alloys have more satisfactory performance than their IM counterpart. The size of grains was indeed refined by RSP, but the tensile fracture mode of aged RSP Al-Li alloys was essentially intergranular fracture, and their ductility was even lower than that of the IM Al-Li alloys. The easily formed precipitation free zones (PFZs) in RSP Al-Li alloys area, the effect of microstructure on the impact fracture mode and on the impact properties of RSP Al-Li alloys is seldom studied. This paper investigates the influence of aging on the impact fracture behavior of a RSP Al-Li alloy, in order to explore its fracture mechanism upon an impact load, and the effect of prior powder boundaries on mechanical properties of the alloy.},
doi = {10.1016/0956-716X(94)90424-3},
journal = {Scripta Metallurgica et Materialia; (United States)},
issn = {0956-716X},
number = ,
volume = 30:5,
place = {United States},
year = {1994},
month = {3}
}