خصوصیات فرسودگی در نمونه های آزمون
ترجمه نشده

خصوصیات فرسودگی در نمونه های آزمون

عنوان فارسی مقاله: فولادهای P92 و ۱۵CH2NMFA – یک مقایسه از خصوصیات فرسودگی به دست آمده در نمونه های آزمون استاندارد و مینیاتوری
عنوان انگلیسی مقاله: P92 and 15CH2NMFA Steels – A Comparison of Fatigue Characteristics obtained on standard and miniature test specimens
مجله/کنفرانس: پروسیدیای مهندسی – Procedia Engineering
رشته های تحصیلی مرتبط: مهندسی مکانیک، جوشکاری
گرایش های تحصیلی مرتبط: ساخت و تولید، صنایع فلزی
کلمات کلیدی فارسی: فرسودگی، نمونه های آزمون مینیاتوری، نمونه های آزمون استاندارد، تراکم تنش، فولادهای P92 و ۱۵CH2NMFA
کلمات کلیدی انگلیسی: Fatigue; Miniature test specimens; Standard test specimens; Stress concentration; P92 and 15CH2NMFA steels
نوع نگارش مقاله: مقاله پژوهشی (Research Article)
شناسه دیجیتال (DOI): https://doi.org/10.1016/j.proeng.2018.02.078
دانشگاه: Regional Technological Institute, University of West Bohemia, Pilsen, Czech Republic
صفحات مقاله انگلیسی: 6
ناشر: الزویر - Elsevier
نوع ارائه مقاله: ژورنال
نوع مقاله: ISI
سال انتشار مقاله: 2018
ایمپکت فاکتور: 0.970 در سال 2018
شاخص H_index: 51 در سال 2019
شاخص SJR: 0.277 در سال 2018
شناسه ISSN: 1877-7058
فرمت مقاله انگلیسی: PDF
وضعیت ترجمه: ترجمه نشده است
قیمت مقاله انگلیسی: رایگان
آیا این مقاله بیس است: خیر
آیا این مقاله مدل مفهومی دارد: ندارد
آیا این مقاله پرسشنامه دارد: ندارد
آیا این مقاله متغیر دارد: ندارد
کد محصول: E12653
رفرنس: دارای رفرنس در داخل متن و انتهای مقاله
فهرست مطالب (انگلیسی)

Abstract

1-Introduction

2-Material for testing

3-Test specimens production

4-Fatigue test performance

5- Test results

6-Conclusions

Acknowledgements

References

بخشی از مقاله (انگلیسی)

Abstract

In this paper, the results of the fatigue tests of the P92 and 15CH2NMFA steels are presented and discussed. The fatigue S – N curves were obtained by means of both standard and miniature test specimens. The Small Fatigue Test (SFT) specimens were manufactured partially by machining and also by waterjet cutting. The fatigue tests were performed on Amsler 10 HFP 5100 ZWICK//Roell high-frequency pulsator at room temperature and R = 0,1 and R = -1 cycle asymmetries. The results obtained on standard and SFT specimens are compared and in case of P92 steel are also compared the two methods of SFT specimens manufacturing. In case of 15CH2NMFA steel, the results of standard and SFT specimens are in a very good agreement both within the time limit fatigue range and the fatigue limit. After taking the stress concentration of SFT specimens into consideration, the results of traditional fatigue test samples and SFT samples are similar. In case of P92 steel, the leaning branch of S-N curves is much steeper for SFT specimens and the fatigue limits lower than it could be expected after the stress concentration is taken into account. The fatigue limits for equal cycle asymmetry show the same ratio of standard to SFT fatigue limits, for R = 0,1 it is 1,31, for R = 1 it is 1,32. This very good agreement can be used for the evaluation of fatigue behaviour of P92 steel by means of SFT specimens. The comparison of the two ways of SFT samples manufacturing revealed a scatter of fatigue test results, nevertheless the fatigue limits differ by 5 MPa only, so that even the influence of the manufacturing seems to be negligible.

Introduction

At present, a great interest is given to the Small Punch Test method. Its greatest advantage is the almost non-destructive intervention into the integrity of mechanical components thanks to the small amount of the removed material. This “new” (also called) semi-destructive method makes it possible to evaluate the current status of operating components on small samples which do not disrupt the integrity of the operating components and makes it also possible to evaluate the current status without long outages. To perform the fatigue tests, the fatigue specimens “SFT” (Small Fatigue Test) according to [1], [2], see Fig.1, were used.