کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5451653 1398550 2017 28 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tensile Properties and Deformation Behaviors of a New Aluminum Alloy for High Pressure Die Casting
ترجمه فارسی عنوان
خواص کششی و رفتار تغییر شکل آلیاژ آلومینیوم جدید برای ریخته گری فشار بالا
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد شیمی مواد
چکیده انگلیسی
Effects of natural aging and test temperature on the tensile behaviors have been studied for a high-performance cast aluminum alloy Al-10Si-1.2Cu-0.7Mn. Based on self-strengthening mechanism and spheroidization microstructures, the alloy tested at room temperature (RT) exhibits higher 0.2% proof stress (YS) of 206 MPa, ultimate tensile strength (UTS) of 331 MPa and elongation of 10%. Increasing aging time improves the YS and UTS and reduces the ductility of the alloy. Further increasing aging time beyond 72 h does not significantly increase the tensile strengths. Increasing test temperature significantly decreases the tensile strengths and increases the ductility of the alloy. The UTS of the alloy can be estimated by using the hardness. The Portevin-Le Chatelier effect occurs at RT due to the interactions between solid solution atoms and dislocations. Similar behaviors occurring at 250 °C are attributed to dynamic strain aging mechanism. Increasing aging time leads to decrease in the strain-hardening exponent (n) value and increase in the strain-hardening coefficient (k) value. Increasing test temperature apparently decreases the n and k values. Eutectic phase particles cracking and debonding determine the fracture mechanism of the alloy. Final failure of the alloy mainly depends on the global instability (high temperature, necking) and local instability (RT, shearing). Different tensile behaviors of the alloy are mainly attributed to different matrix strengths, phase particle strengths and damage rate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Science & Technology - Volume 33, Issue 4, April 2017, Pages 367-378
نویسندگان
, , , ,