Latent hardening behavior of monocrystalline Al-Mg solid solution

Journal Article · Sat Nov 01 04:00:00 EST 1997 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-997-0192-5· OSTI ID:556476

Wu, H M ^[1]; Przystupa, M A; Ardell, A J ^[2]

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1. Tatung Inst. of Tech., Taipei (Taiwan, Province of China). Dept. of Materials Engineering
2. Univ. of California, Los Angeles, CA (United States). Dept. of Materials Science and Engineering

The latent hardening behavior of dilute Al-Mg single crystal was investigated in this study. The authors performed the latent hardening tests on five systems, one in each of the five system groups. The latent hardening ratios (LHR) and the hardening rates were calculated. The LHR of systems that form attractive junctions is highest in this investigation. The LHRs of systems that form Lomer-Cottrell sessile locks, Hirth locks, or cross-slip systems are in the middle range. The coplanar system has the lowest LHR, which is in agreement with the theoretical prediction. An equation was developed that correlates the LHR with the dislocation densities at various prestrain values. The secondary deformation curve is predicted qualitatively in accordance with the interaction strength of the latent system with the primary system. Based on such a model, a prediction of the shapes of the secondary deformation curves in the strongest and weakest latent systems can be made.

• Sponsoring Organization: USDOE
• OSTI ID: 556476
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 11 Vol. 28; ISSN 1073-5623; ISSN MMTAEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
DEFORMATION
DISLOCATIONS
MAGNESIUM ADDITIONS
MATHEMATICAL MODELS
MONOCRYSTALS
ORIENTATION
PREDICTION EQUATIONS
SOLID SOLUTIONS
YIELD STRENGTH