Hello,
I apologize for the late reply.
In regard to your questions about our no.8, we did not perform polishing on all the samples. We are trying to check the accuracy of the results without polishing, because for some of our applications performing polish will be difficult. Some tests show correct graphs while others don't. But the test areas are identical.
We can send a picture of the curves we are measuring, yes.
Until you have an answer for 8, could you kindly answer the rest of the questions?
An additional question:
Sent: Wednesday, June 30, 2021 9:11 AM
To: Ziv Ungarish
Cc: almogbiton10@gmail.com
Subject: RE: ABI Device
Dear Ziv Ungarish,
I am sorry for send again.
How many number of grit(sand paper) did you use for the polishing?
At least, have to done by 1000 grit.
Best regards,
JaeHoonChoi.
Engineering&Marketing Dept.
Sales Engineer / JaeHoon Choi
E-mail : jhchoi@frontics.com
Website : http://www.frontics.com/
Tel: 82-2-884-8025, 82-2-875-8021
Fax: 82-2-875-8018
From:
최재훈 <jhchoi@frontics.com>
Sent: Wednesday, June 30, 2021 3:03 PM
To: 'Ziv Ungarish' <ZivU@nrcn.gov.il>
Cc: 'almogbiton10@gmail.com' <almogbiton10@gmail.com>
Subject: RE: ABI Device
Dear Ziv Ungarish,
I would like to ask some questions for No.8.
Are whole test area shows same graph with what you sent me?
If not, can you share the test data?
I think some test area shows normal graph correctly.
We need to analyze both areas to find the answer.
Best regards,
JaeHoonChoi.
Engineering&Marketing Dept.
Sales Engineer / JaeHoon Choi
E-mail : jhchoi@frontics.com
Website : http://www.frontics.com/
Tel: 82-2-884-8025, 82-2-875-8021
Fax: 82-2-875-8018
From:
최재훈 <jhchoi@frontics.com>
Sent: Wednesday, June 30, 2021 2:48 PM
To: 'Ziv Ungarish' <ZivU@nrcn.gov.il>
Cc: 'almogbiton10@gmail.com' <almogbiton10@gmail.com>
Subject: RE: ABI Device
Dear Ziv Ungarish and Almog Biton,
I kindly apologize for the huge delayed response for the questions.
Some of our engineers resigned from our company. So, I have missed this questions.
I will try to give you the answer as soon as possible.
Please wait a bit more time.
Best regards,
JaeHoonChoi.
Engineering&Marketing Dept.
Sales Engineer / JaeHoon Choi
E-mail : jhchoi@frontics.com
Website : http://www.frontics.com/
Tel: 82-2-884-8025, 82-2-875-8021
Fax: 82-2-875-8018
From: Ziv Ungarish <ZivU@nrcn.gov.il>
Sent: Wednesday, May 26, 2021 11:57 PM
To: 최재훈 <jhchoi@frontics.com>
Cc:
almogbiton10@gmail.com
Subject: Re: ABI Device
Dear JaeHoonChoi,
I will try to clarify question 8. Please see the attached file that shows a sketch of the L-D curve. The first two cycles are flawed because of surface effects in the sample, and that will have a negative effect on the measured properties. How can we overcome these two flawed cycles? Maybe a preload (as marked in the sketch)? Maybe these cycles could be neglected in the analysis.
Please feel free to ask for any additional clarifications.
Thank you,
Ziv Ungarish
From:
최재훈 <jhchoi@frontics.com>
Sent: Thursday, May 20, 2021 10:44 AM
To: 'אלמוג ביטון'
Cc: Ziv Ungarish
Subject: RE: ABI Device
Dear Almog Biton,
Thanks for your clarification and I will share the question with our engineers.
I would like to ask more detail explanation for the question No.8.
I can’t understand what mean is. If possible, can you provide more information as detail as possible.
Best regards,
JaeHoonChoi.
Engineering&Marketing Dept.
Sales Engineer / JaeHoon Choi
E-mail : jhchoi@frontics.com
Website : http://www.frontics.com/
Tel: 82-2-884-8025, 82-2-875-8021
Fax: 82-2-875-8018
From: אלמוג ביטון <almogbiton10@gmail.com>
Sent: Thursday, May 20, 2021 3:09 PM
To: 최재훈 <jhchoi@frontics.com>
Cc:
ZivU@nrcn.gov.il
Subject: ABI Device
Dear JeaHoon Choi,
How are you?
I hope you are doing well.
I would like to introduce two engineers who work with me on the ABI team in my lab., Eng. Ziv and Eng.Ilan.
On this occasion I would like to create for them a direct channel in front of you for future ABI questions.
We start to do our experiments and we have some questions:
- What's the diameter of the spherical indenter?
- What's the elastic modulus of the spherical indenter?
- How do we export the force-displacement curve data to excel?
- How do we export the stress-strain curve data points and their fitting equation to excel?
- What's the difference between type 1 and type 6 in the tensile properties analysis? We have analyzed some aluminum specimens using both types, and we kept getting exactly the same results (our requirement was that type 6 will be used for Al 1100).
- We have tested Al 6061-T6 and obtained tensile properties using different material types. Only the analysis with type 3 gave us relatively accurate yield stress results (compared to standard tensile test results), even though Al 6061 is supposedly a type 1 alloy according to the manual guide. What is the reason? What is your recommendation on how to choose the material type for accurate analysis?
- We performed ABI tests and obtained force-displacement curves that look absolutely standard, yet when we analyzed the results, sometimes the program couldn't finish the analysis. It doesn't even show an error message, the analysis progress bar just stops progressing. Restarting the software or the computer doesn't help. When we indent again at another location on the specimen and get a similar force-displacement curve, suddenly the program can analyze it. We would like to know why the software can't analyze the data from the first indentation.
- Can a testing preload be set? Sometimes the sample has slight surface effects, making the first one or two cycles defective and unrepresentative of the material bulk. A small preload or an option to ignore selected parts of the force-displacement curve could offer a solution.
- In the .txt file, the first row is shifted by one column. Can this be fixed?
Please help.
Best regards,
Eng. Almog
Eng. Ziv
Eng. Ilan