#vickershardnesstest

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How to Choose Hardness Test (For Beginner)?

Hello, my best friend! How have you been? We haven’t talked to each other for a while.

In this video, I will show you some tips on how to choose the proper hardness tester for your product.

As you know, choosing the wrong hardness tester will waste lots of money!

So follow us, let’s go!

Manufacturers and scientists normally go through the hardness test of any solid material to know the quality or identify the element.

The hardness gives an idea about the material’s characteristic behavior.

The material properties such as resistance, durability, strength, denting, etc. can be determined by doing the hardness test.

Otherwise, it is really hard to know whether the material will serve the purpose or not. Determine the testing method for the test is an important task.

The type, size, and microstructure everything must be considered for that.

So, seriously, how to choose the right hardness tester?

Before we go further, let me tell you something, my old sport.

Just between you and me.

if you are looking to buy a professional and high-quality hardness tester,

please visit our website www.test-hardness.com. and, please, please remember to ask for a coupon!

Keep this secret for me, would you?

Ok, let’s move on.

For testing the hardness of metallic objects, there are a few methods,

like the Rockwell hardness test, the Vickers hardness test, the Knoop hardness test, and the Brinell hardness test.

What is Rockwell hardness test?

The Rockwell test is the most common and easiest method used in the industry.

An indent is there which is inserted into the surface of the material by a major load and then the depth is measured.

It is the quickest and most convenient one used for a larger sample.

What is The Vickers hardness test?

The Vickers test also another one used for measuring the hardness of all types of solid materials.

The diagonal lengths are measured to calculate the hardness of the sample. It is used for both the macro hardness testing and microhardness testing.

What is The Knoop hardness test?

The Knoop test can be the alternative to the Vickers test. It is applicable to materials like ceramic which is brittle and hard as well. The hardness test is done at the micro-level.

The indenter that is used is a pyramidal diamond-shaped and asymmetric.

It is suitable for small areas. It helps to test thin layer hardness like coating. The cracking problem can be solved by this.

What is The Brinell hardness test?

The Brinell hardness test is for materials that have a grain structure and are large in size.

Here a carbide ball is used to measure the hardness optically.

what is Mohs hardness test?

For minerals or rocks, the most common test is the Mohs hardness test.

How to test hardness for woods?

For woods, the most common is the Janka test.

Here, a small steel ball is inserted on the surface and the force is measured to know the hardness.

To get an accurate result, there are a few other factors that must be considered and controlled,

like vibrations, temperature, light, humidity, temperature, etc.

Do you have a good time today?

We will talk about How to test the hardness of rocks at home in the next video.

Don’t forget to subscribe to our channel to watch more videos about professional hardness testers, my dear old sport.

Also, you can check our website www.test-hardness.com to find more information about our hardness tester product and latest industry news.

Stay tuned for the next episode my dear best friend!

I hope you have a wonderful day!

See you.

https://youtu.be/4ipwT4BvZYg

[banbrosengineering-blog]

Hardness Testing Machines

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[qiujumper]

Why use the Vickers hardness test?

For many quality testing and other procedures, hardness testing holds prime importance.

Hardness tests enable us to evaluate the properties of materials such as ductility, strength and wear resistance that will help us determine to check if the material is suitable for a specific purpose.

The hardness of a material is not its fundamental property, but it's only a way to determine the resistance exhibited by material to permanent deformation.

The hardness test to be performed for a specific material is based on the homogeneity, size, type, and condition of the material you are going to test. There are several hardness tests available, and one of them is the Vickers hardness test.

Vickers hardness testing

Vickers hardness testing is a multifaceted testing method that can be used for both micro and macro hardness testing.

Vickers hardness test was developed by George E. Sandland and Robert L. Smith in 1921 as an alternative to the Brinell method for measuring material hardness.

A wide range of applications and materials can be subjected to Vickers hardness testing, including microhardness testing.

It is generally considered easy to be carried out as compared to other hardness tests since the indenter can be used with all kinds of materials irrespective of their hardness and also because the size of the indenter doesn’t effect the required calculations.

Categorization of Vickers testing method

Vickers testing method is considered as a static hardness testing method that can be characterized further into the following aspects:

Regarded as one of the standardized procedures (ASTM E384, ASTM E92, ISO 6507)

It is an optical method which means the hardness value of a test material/specimen is determined by the size of the indentation.

The indenter has a plane angle of 136° and is an equilateral diamond shaped pyramid.

Vickers testing method can be used across all load ranges used for hardness testing (from micro to macro ranges) as it has a test load range from 1gf up to 120 kgf according to ASTM and 1gf according to ISO respectively.

How is it performed?

Vickers hardness test is incredible in its ability to be performed on both micro and macro hardness scales with a maximum test load of around 50 kgs.

Vickers hardness test is performed by putting a controlled force on the indenter that is usually a square-shaped diamond pyramid over a period of time.

After a particular indenter is pressed into the surface under testing, the indentation resulting from it is measured with the aid of high-powered magnifying instruments such as microscopes and eyepieces. Sometimes, the software is also used to analyze and generate more precise results.

Two varying forces are used by Vickers hardness tests such as micro ranges at 10 to 100 grams and macro ranges from 1 to 100 kgs.

Both ranges use the same indenter hence producing hardness values that are constant over all-metal hardness ranges.

Sample preparations are mandatory to obtain precise results. A sample is required that is small enough to fit into the tester adequately.

Moreover, to achieve accurate measurement and regular shape of indentation, the preparation must have a smooth surface. This also makes sure that the indenter can conveniently hold the subject perpendicularly.

Specimen required for Vickers hardness testing

The surface of the specimen that is needed for the Vickers testing method needs to be prepared first when using Vickers method.

This is because the requirements of specimen surface quality are stricter than other testing procedures.

The specimen needs to meet the given requirements for Vickers hardness test:

The specimen/ material has to be precision-ground in case of macro-hardness testing or polished for micro-hardness testing.

The specimen/material shouldn’t move during the testing procedure and should be clamped strongly.

Moreover, care should be taken regarding any kind of vibration or disturbance while conducting a Vickers hardness test to avoid poor results.

Importance of Vickers hardness test

Vickers test can be very beneficial for applications such as testing ultra-thin materials like foils.

They can also be very useful for measuring single microstructures, small parts or surfaces and determining a hardness change profile by producing an indentation series.

If the indentation is smaller, the object will be harder. Likewise, the material is expected to lack hardness if the indentation is large.

Vickers hardness testing is used by several industries to determine the right kind of material to be used for machinery and operations.

The material with the best hardness conditions is then chosen for the specific purpose in the industry.

Advantages of Vickers hardness tests

There are several advantages of the Vickers hardness test. Some of them are discussed below:

Vickers hardness tests procedures cover the entire hardness range, and hence it can be used for any kind of specimen or material whether it's hard or soft. Either it's about microhardness testing or macro hardness testing, Vickers hardness tests can generate accurate results for both.

Often considered as Microhardness testing, Vickers hardness tests are used to test any kind of material including composites, ceramics, and metals, etc.

Only one type of indenter is used for various kinds of Vickers methods.

The specimen used in the Vickers hardness test can be used for other purposes as well because the test also accompanies non-destructive testing.

Disadvantages of Vickers hardness testing

Despite many advantages that render Vickers testing to be one of the best hardness testing methods, there are a few disadvantages as well that should be taken into consideration.

As the indent is measured optically, the specimen’s surface quality must be smooth and good. This means that the precise evaluation could be difficult if the test location is not well- prepared (i.e., polished and ground).

Compared to Rockwell hardness testing and other methods, Vickers hardness testing is comparatively slow. The test cycle doesn’t include the time taken to prepare the specimen and takes around 30-60 seconds approximately.

Vickers hardness tests need to be equipped with an optical system due to the necessary optical indent evaluation. This renders Vickers hardness testing to be more expensive to purchase as compared to other testers, including Rockwell tester.