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  1. بهبود کارایی جستجو در شبکه های نظیر به نظیر با استفاده از اطلاعات شبکه اینترنت
بررسی خواص اتصال TLP ایجاد شده به روش حرارت دهی دو مرحله ای در فولاد زنگ نزن 304
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بررسی خواص اتصال TLP ایجاد شده به روش حرارت دهی دو مرحله ای در فولاد زنگ نزن 304

بهره مند، محمدرضا Bahrehmand, Mohammadreza

Mechanical Properties of TLP bonded SS304 by Two Steps Heating

Bahrehmand, Mohammadreza | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51740 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Ekrami, Aliakbar
  7. Abstract:
  8. Austenitic stainless steels are the most common kinds of stainless steels. Although these alloys are generally very weldable, there are some problems in join- ing of them using fusion welding. Solidification and liquation cracking or corrosion at grain bound- aries in the heat-affected zone are examples of these problems. Transient liquid phase (TLP) bonding is an important variation of diffusion bonding that has the potential to overcome this problems. Two-step TLP bonding is an ingenious development to form non-planar interface. This method consists of a short-time high temperature heating to melt interlayer followed by isothermal solidification of liquid phase at a lower temperature. In this study, the two-step TLP bonding was applied to join AISI 304 steels using a Ni-based interlayer with 75µm thickness.Tow step heating include: at first heating to high tempratre 1170˚C, maintain in this temperature 5 minuties then cooling to 1150 ˚C and 1120 ˚C, in this to temperature maintain until iso thermal solidification completed .The microstructures and mechanical properties of the joint were investigated and compared with that of conventional TLP bonding. The two-step heating can remarkably reduce the time of bonding: 40% reducing bonding time, but mechanical properties are similar to conventional TLP bonding
  9. Keywords:
  10. Austenitic Stainless Steel ; Transient Liquid Phase Boneling (TLPB) ; Two Steps Heating ; Nickel Based Interlayer

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