کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10417372 902360 2014 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development of ultrasonic thread root rolling technology for prolonging the fatigue performance of high strength thread
ترجمه فارسی عنوان
توسعه فن آوری رول رشته اولتراسونیک برای طولانی شدن عملکرد خستگی از رشته قوی
کلمات کلیدی
رشته نورد رشته ی التراسونیک، روند نورد رول موضوع عملکرد خستگی، فولاد با مقاومت بالا
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی
Fatigue failure commonly occurs at mechanical products, especially the threaded joints with high stress concentration. Even though various high strength alloys are adopted, accidence due to fatigue failure of thread still happens. As a novel method to improve the thread fatigue life, ultrasonic thread root rolling (UTRR) process is developed in this paper. The configuration of the UTRR apparatus together with the principle of the UTRR is first introduced and described. Rolling experiments are then conducted on AerMer100 thread specimens by use of the UTRR process and conventional thread root rolling (CTRR) process respectively. Mechanical characteristics and fatigue properties for these treated specimens and untreated specimens are tested. Compared with CTRR, surface finish of thread root is farther improved from Ra 0.106 to Ra 0.051, and higher residual stress is achieved for UTRR. The depth of microstructure-refined zone induced in UTRR is about 20 μm, while that of CTRR is approximately 12 μm. These further enhanced mechanical properties greatly contribute to the improvement of fatigue performance, and it is well proved by fatigue results that an increase of about 7 times for fatigue life of AerMet100 specimens is achieved after UTRR, while only 3 times is achieved for CTRR. Striations from fracture surface explicitly confirm this result.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 214, Issue 11, November 2014, Pages 2395-2401
نویسندگان
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