نتایج جستجو برای: mechanical properties of steel

تعداد نتایج: 21212249  

2015
M. STYGAR

The objective of this work was to expand the knowledge on mechanical properties of the oxidized Crofer 22 APU Ferritic Stainless Steel. To examine adhesion of oxide scale formed on steel the scratch test was performed. Scratch test as an appropriate method for qualitative evaluation of the film adhesion to substrate has been used in many studies. Scratch properties were investigated before and ...

2017
Noraini Abu Bakar Lawrence Tan

Introduction: The Damon system recommended the use of revolutionary, hightechnology Damon edgewise 0.019” x 0.025” orthodontic stainless steel archwires (OSSA) for major mechanics and finishing and claimed that this new archwires offer greater efficiency during orthodontic treatment. No study has been carried out to compare this relatively new archwires to other popular OSSA already in the mark...

2005
H. K. D. H. Bhadeshia

The methods now available for the computation of heat and fluid flow, solidification, microstructural and residual stress development are well advanced. It is logical therefore to proceed to the quantitative relationships between microstructure and mechanical properties so that the variety of models can be consolidated and used directly in the design process. This paper deals with a few of the ...

The influence of heat-input and pre-heat treatment on the structure, mechanical and corrosion behaviors of 2205 duplex stainless steel joint by means of GMAW process was the goal of this study. In this regards, the welding process was done using different heat input in the range of 0.6 to 1.4 kJ/mm and different pre-heating treatments in the range of 25 to 100 oC. The microstructural properties...

H. Sharifi, I. Kheirollahi-Hosseinabadi R. Ghasemi

To investigate the effect of tempering treatment on mechanical properties and the microstructure of DIN 1.4021 Martensitic Stainless Steel, austenite treatment was conducted for the samples at 1000 ºC temperature for 60 min and then the samples were oil quenched. Later, tempering treatments were performed for the samples at 500 ºC and 700 ºC temperatures for 2 and 5 h, respectively; then quench...

Mechanical properties of the alloys are a strong function of the average silicon particles size and the secondary dendrite arm spacing (SDAS). Modified Hall-Petch equation expresses the effects of these two microstructural parameters on the yield strength and ultimate tensile strength of the Al-Si based alloys. These microstructural parameters depen on parameters such as chemical composition, c...

2013
V Muthukrishnan

The experimental study deals with Hybrid fibre reinforced concrete with the use of (Polypropylene and Recycled polyethylene terephthalate RPET). The M40 grade concrete used was designed by using IS10262-2009 code. The steel fibre and synthetic fibre were added at the volume fractions up to 0.5%. Test results showed that the fibres, when used in a hybrid form, could result in superior composite ...

2016
Cheng-Yi Chen Fei-Yi Hung Truan-Sheng Lui Li-Hui Chen Hugo F. Lopez

SUS440 is a high-carbon stainless steel, and its martensite matrix has high heat resistance, high corrosion resistance, and high pressure resistance. It has been widely used in mechanical parts and critical materials. However, the SUS440 martempered matrix has reliability problems in thin plate applications and thus research uses different austempering heat treatments (tempering temperature: 20...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران - دانشکده مهندسی موادو متالورژی 1387

جهت بررسی ریزساختار و خواص مکانیکی (سختی، چقرمگی و خواص سایشی) و بهینه سازی مقاومت سایشی و چقرمگی فولادهای کروم-مولیبدن دار، این فولاد تحت عملیاتی حرارتی مختلف کوینج مستقیم و همدما قرار گرفت. قطعات پس از نگهداری در دمای آستنیته در کوینج مستقیم بوسیله آب، هوای فشرده و هوای آرام خنک شد و در کوینج همدما در حمام نمک به مدت 802، 30و 120 دقیقه در دماهای c 200 (عملیات مارتمپرینگ) و c 300 (عملیات آستمپ...

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