The T5 Isochronal Age-Hardening Response of As Solidified Mg-Li-RE-(Al) Alloys

Abstract

This investigation sought to explore the age hardenability of MgLiRE(Al) alloys where RE = Gd, Y, Nd. Alloys were made by induction melting and furnace cooling. The resulting as-solidified alloys were subjected to isochronal heat treatment of 2 h at temperatures between 150400 C followed by water quenching. Hardness measurements revealed MgLiRE alloys containing Al displayed a U-shaped age-hardening effect where the hardness was large at low and high temperatures but decreased at intermediate temperatures. On the contrary, MgLiRE alloys sans Al did not show an age-hardening response, likely due to precipitation of RE-rich phases upon solidification. Correlations of hardness with historical tensile data of MgLi alloys indicate that MgLiRE alloys are not likely to be considered for structural applications.

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Document Details

Document Type
Technical Report
Publication Date
Sep 26, 2022
Accession Number
AD1181626

Entities

People

  • Joseph Labukas
  • Taylor Cain

Organizations

  • United States Army

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Age Hardening
  • Alloys
  • Ceramic Materials
  • Corrosion Resistance
  • Crystal Structure
  • Dispersion Hardening
  • Electron Microscopy
  • Elements
  • Energy
  • Hardening
  • Hardness
  • Heat Energy
  • Heat Treatment
  • Magnesium Alloys
  • Measurement
  • Mechanical Properties
  • Phase Transformations
  • Precipitation
  • Silicon Carbide
  • Solidification
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.