Excess Penetrant Removal – Step 3 (cont.)

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● Introduction
● Outline
● How Does PT Work?
● What Makes PT Work?
● What Can Be Inspected Via PT?
● What Can NOT be Inspected Via PT?
● What Types of Discontinuities Can Be Detected Via PT?
● Choices of Penetrant Materials
● Penetrant Materials
● Sensitivity Levels
● Visible Vs Fluorescent PT
● Why is Visible Penetrant Red and Fluorescent Penetrant Green?
● Penetrant Removal Method
● Developers
● 6 Steps of Penetrant Testing
● Pre-cleaning – Step 1
● Caution About Metal Smearing
● Penetrant Application – Step 2
● Dwell Time
● Excess Penetrant Removal – Step 3
● Excess Penetrant Removal – Step 3 (cont.)
● Developer Application – Step 4
● Developer Application – Step 4 (cont.)
● Inspection/Evaluation – Step 5
● Post Clean – Step 6
● Penetrant Inspection Systems
● Verification of Penetrant System Performance
● Summary
● Glossary of Terms

نوع زبان: انگلیسی حجم: 6.51 مگا بایت
نوع فایل: اسلاید پاورپوینت تعداد اسلایدها: 44 صفحه
سطح مطلب: نامشخص پسوند فایل: ppt
گروه موضوعی: زمان استخراج مطلب: 2019/05/15 08:54:28

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عبارات مهم استفاده شده در این مطلب

عبارات مهم استفاده شده در این مطلب

., penetrant, pt, surface, material, testing, level, sensitivity, defect, visible, fluorescent, presentation,

توجه: این مطلب در تاریخ 2019/05/15 08:54:28 به صورت خودکار از فضای وب آشکار توسط موتور جستجوی پاورپوینت جمع آوری شده است و در صورت اعلام عدم رضایت تهیه کننده ی آن، طبق قوانین سایت از روی وب گاه حذف خواهد شد. این مطلب از وب سایت زیر استخراج شده است و مسئولیت انتشار آن با منبع اصلی است.

http://mech.vub.ac.be/teaching/info/Damage_testing_prevention_and_detection_in_aeronautics/Intro_to_Penetrant.ppt

در صورتی که محتوای فایل ارائه شده با عنوان مطلب سازگار نبود یا مطلب مذکور خلاف قوانین کشور بود لطفا در بخش دیدگاه (در پایین صفحه) به ما اطلاع دهید تا بعد از بررسی در کوتاه ترین زمان نسبت به حدف با اصلاح آن اقدام نماییم. جهت جستجوی پاورپوینت های بیشتر بر روی اینجا کلیک کنید.

عبارات پرتکرار و مهم در این اسلاید عبارتند از: ., penetrant, pt, surface, material, testing, level, sensitivity, defect, visible, fluorescent, presentation,

مشاهده محتوای متنیِ این اسلاید ppt

مشاهده محتوای متنیِ این اسلاید ppt

penetrant testing ۱.psd ۳.psd this presentation was developed to provide students in industrial technology programs such as welding an introduction to penetrant testing. the material by itself is not intended to train individuals to perform ndt functions but rather to acquaint individuals with the ndt equipment and methods that they are likely to encounter in industry. more information has been included than might necessarily be required for a general introduction to the subject as some instructors have requested at least ۶ minutes of material. instructors can modify the presentation to meet their needs by simply hiding slides in the slide sorter view of powerpoint. this presentation is one of eight developed by the collaboration for ndt education. the topics covered by the other presentations are introduction to nondestructive testing visual inspection ultrasonic testing magnetic particle testing radiographic testing eddy current testing welder certification all rights are reserved by the authors and the presentation cannot be copied or distributed except by the collaboration for ndt education. a free copy of the presentations can be requested by contacting the collaboration at ndt ed@cnde.iastate.edu. introduction this module is intended to provide an introduction to the ndt method of penetrant testing. penetrant testing or pt is a nondestructive testing method that builds on the principle of visual inspection. pt increases the seeability of small discontinuities that the human eye might not be able to detect alone. outline general introduction penetrant materials and considerations basic steps in penetrant testing common equipment advantages and limitations summary glossary of terms how does pt work in penetrant testing a liquid with high surface wetting characteristics is applied to the surface of a component under test. the penetrant penetrates into surface breaking discontinuities via capillary action and other mechanisms. excess penetrant is removed from the surface and a developer is applied to pull trapped penetrant back the surface. with good inspection technique visual indications of any discontinuities present become apparent. what makes pt work every step of the penetrant process is done to promote capillary action. this is the phenomenon of a liquid rising or climbing when confined to small openings due to surface wetting properties of the liquid. some examples plants and trees draw water up from the ground to their branches and leaves to supply their nourishment. the human body has miles of capillaries that carry life sustaining blood to our entire body. basic process of pt ۱ clean dry component ۴ apply developer ۲ apply penetrant ۳ remove excess ۵ visual inspection ۶ post clean component what can be inspected via pt almost any material that has a relatively smooth non porous surface on which discontinuities or defects are suspected. what can not be inspected via pt components with rough surfaces such as sand castings that trap and hold penetrant. porous ceramics wood and other fibrous materials. plastic parts that absorb or react with the penetrant materials. components with coatings that prevent penetrants from entering defects. defect indications become less distinguishable as the background noise level increases. what types of discontinuities can be detected via pt all defects that are open to the surface. rolled products cracks seams laminations. castings cold shuts hot tears porosity blow holes shrinkage. forgings– cracks laps external bursts. welds– cracks porosity undercut overlap lack of fusion lack of penetration. choices of penetrant materials penetrant type i fluorescent ii visible method a water washable b postemulsifiable lipophilic c solvent removable d postemulsifiable hydrophilic developer form dry powder wet water soluble wet water suspendable wet non aqueous the first task when conducting and inspection using pt is to choose the right materials for the job. each combination of materials has its own advantages and disadvantages which will be discussed in the following slides. penetrant materials penetrants are formulated to possess a number of important characteristics. to perform well a penetrant must spread easily over the surface being inspected. be drawn into surface breaking defects by capillary action or other mechanisms. remain in the defect but remove easily from the surface of the part. remain fluid through the drying and developing steps so it can be drawn back to the surface. be highly visible or fluoresce brightly to produce easy to see indications. not be harmful to the inspector or to the material being tested. sensitivity levels penetrants are also formulated to produce a variety of sensitivity levels. the higher the sensitivity level the smaller the defect that the penetrant system is capable of detecting. the five sensitivity levels are level ۴ ultra high sensitivity level ۳ high sensitivity level ۲ medium sensitivity level ۱ low sensitivity as the sensitivity level increases so does the number of non relevant indications. therefore a penetrant needs to be selected that will find the defects of interest but not produce too many non relevant indications. visible vs fluorescent pt inspection can be performed using visible or red dye or fluorescent penetrant materials. visible pt is performed under white light while fluorescent pt must be performed using an ultraviolet light in a darkened area. all are all in the level ۱ sensitivity range. fluorescent pt is more sensitive than visible pt because the eye is more sensitive to a bright indication on a dark background. sensitivity ranges from ۱ to ۴. why is visible penetrant red and fluorescent penetrant green visible penetrant is usually red because red stands out and provides a high level of contrast against a light background fluorescent penetrant is green because the eye is most sensitive to the color green due to the number and arrangement of …

کلمات کلیدی پرکاربرد در این اسلاید پاورپوینت: ., penetrant, pt, surface, material, testing, level, sensitivity, defect, visible, fluorescent, presentation,

این فایل پاورپوینت شامل 44 اسلاید و به زبان انگلیسی و حجم آن 6.51 مگا بایت است. نوع قالب فایل ppt بوده که با این لینک قابل دانلود است. این مطلب برگرفته از سایت زیر است و مسئولیت انتشار آن با منبع اصلی می باشد که در تاریخ 2019/05/15 08:54:28 استخراج شده است.

http://mech.vub.ac.be/teaching/info/Damage_testing_prevention_and_detection_in_aeronautics/Intro_to_Penetrant.ppt

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