کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1575189 1514738 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Strengthening mechanisms of T1 precipitates and their influence on the plasticity of an Al-Cu-Li alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Strengthening mechanisms of T1 precipitates and their influence on the plasticity of an Al-Cu-Li alloy
چکیده انگلیسی
This paper presents a systematic study of the influence of the state of precipitation on the plasticity of an Al-Cu-Li alloy. By varying the heat treatment, a variety of T1 precipitate morphologies are obtained. Atomic resolution electron microscopy observations show that T1 precipitates remain shearable even during early stages of over-ageing when their thickness is of several nanometres. They appear to be sheared only by single dislocations at a given location, which prevents catastrophic strain localisation at a microscopic scale. In later stages of over-ageing, the study of macroscopic strain hardening rate and of slip line localisation strongly suggests a transition to precipitate by-passing. The influence of the strengthening mechanism on strain reversal experiments (Bauschinger effect) is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 605, 27 May 2014, Pages 119-126
نویسندگان
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