کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1628279 1006076 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High Temperature Low Cycle Fatigue Behavior of GH4742 Alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
High Temperature Low Cycle Fatigue Behavior of GH4742 Alloy
چکیده انگلیسی
High temperature low cycle fatigue tests on GH4742 superalloy were studied under the total strain-controlled conditions at 650 °C. Combined with fatigue test data, fatigue properties of the alloy were analyzed. Fracture morphology and dislocation structure were observed by scanning electron microscopy and transmission electron microscopy. The results showed that fatigue life and fatigue resistance of GH4742 alloy decreased significantly with increasing total strain amplitude. The cyclic hardening, cyclic softening and cyclic stability phenomena of the alloy occurred during the low cycle fatigue process. The increasing total strain amplitude is conducive to the formation of γ′ phase. Fatigue crack propagation is controlled jointly by ductile and brittle fracture. Inhomogeneous deformation and deformation restricted in slip bands are the main reasons for the reduction of fatigue life of GH4742 alloy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Iron and Steel Research, International - Volume 22, Issue 6, June 2015, Pages 551-556
نویسندگان
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