نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی مهندسی مکانیک، دانشگاه سمنان، سمنان، ایران

2 استادیار، دانشکده مهندسی مکانیک، دانشگاه سمنان، سمنان

چکیده

در این مقاله به مطالعه استحکام لایه ای در کامپوزیت آلومینیوم AA1050 و فولاد SS 316 تولید شده به روش فرآیند اتصال نورد تجمعی پرداخته شده است. نمونه های فرآیند نورد تجمعی به منظور بررسی استحکام لایه کنی و برشی تحت آزمون کشش تک محور در جهت نورد قرار گرفتند . استحکام لایه ای در هر نمونه اندازه گیری و نتایج حاصل از آزمایش ها با یکدیگر مقایسه شدند . نتایج نشان داد که استحکام در برش لایه ای نسبت به لایه کنی بیشتر بوده است؛ همچنین پس از انجام 5 پاس فرآیند نورد تجمعی، ریز ساختار ورق مشاهده شد. به منظور بررسی استحکام نمونه ها طی پاس های مختلف فرآیند، آزمون های کشش انجام شدند که نتایج، به طور کلی بیانگر افزایش استحکام بودند. مطالعات بعدی بر روی تصاویر میکروسکوپ الکترونی روبشی مقاطع شکست نمونه های حاصل نشان داد که با افزایش پاس های فرآیند، ضخامت لایه های فولاد کمتر گشته تا این لایه ها در پاس 3 به پارگی رسیدند. در ادامه تغییرات سختی در راستای ضخامت ورق، در پاس های متوالی مطالعه شدند. نتایج حاکی از آن بودند که در پاس 2 افزایش سختی چشمگیر بوده است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

A Study of layer strength in composite Al 1050/SS 316 manufactured by Accumulative Roll bonding process

نویسندگان [English]

  • Majid Khodabakhshi 1
  • Masoud Mahmoodi 2

1 Department of Mechanical Engineering, Semnan University, Semnan, Iran

2 Department of Mechanical Engineering, Semnan University, Semnan, Iran

چکیده [English]

This paper studies the shear and peel strength of composite AA1050 aluminum and SS 316 steel manufactured by accumulative roll bonding (ARB) process. The ARB samples were tested for shear and peel strength under a single axial tensile test. The layer strength was measured in each sample and the results of the experiments were compared. The results showed that the shear strength of layers was higher than the peel strength; also the microstructure of the sheet after performing 5 cycles of the ARB process was observed. To test the strength of the samples during different passes of the process, tensile tests were carried out; the results indicated a general increase in strength. Further studies on the scanning electron microscope (SEM) images of the fracture sections of the samples showed that by increasing the number of passes, the thickness of the steel layers was less than that in the pass 3 of these layers to tear. In the following, hardness changes along the sheet thickness were studied in successive passes. The results indicated that the pass 2 had an impressive increase in hardness.

کلیدواژه‌ها [English]

  • Composite Al/St
  • Accumulative roll bonding (ARB)
  • Peel strength
  • Shear strength

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