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

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90424-3· OSTI ID:5227778

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

---

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

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.

• OSTI ID: 5227778
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 30:5; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
AGING
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
FRACTURE PROPERTIES
LITHIUM ALLOYS
MECHANICAL PROPERTIES
STATIC LOADS