hardness test lab report

The Brinell Hardness Number BHN is obtained by dividing the applied force P in kgf. HARDNESS TESTING PURPOSE The purpose of this exercise is to obtain a number of experimental results important for the characterization of the mechanical properties and performance of materials.

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The materials and the aforesaid property have significant use in civil engineering.

. D is diameter of the ball used for indentation. Hardness Testing Lab Report. For soft or very hard materials the Brinell test cannot be used.

Rockwell hardness number of a given spec imen is. The materials and the aforesaid property have significant use in civil engineering. PRACTICAL HARDNESS TESTING MADE SIMPLE 9 3.

The Leading Online Publisher of National and State-specific Legal Documents. Brinell Hardness Test For Brinell hardness test. Hardness Testing Quang Nguyen School of Engineering Grand Valley State University Laboratory Module 4 EGR 250 Material Science Engineering Section 902 Instructor.

Hardness Testing Lab Report. D is the diameter of the impression produce by the ball on the work piece. 3 Plot of Hardness v Tempering Temperature for the High Speed Steel for each hardness test.

Scratch hardness indentation hardness and rebound hardness. Graduation is used applying major loa d up to 150Kg. Hardness is defined as a measure of a materials resistance to localised plastic deformation i.

PdfFiller allows users to edit sign fill and share all type of documents online. The purpose of the following experiments is to study the hardness of different types of materials and to understand the significance of this property in materials. The geometry of indentation is given in Figure-1 and the hardness is determined according to the relationship BHN 2 2212.

A Keep the loading and unloading lever at position A which is unloading position. There are three types of hardness that can be determined for a material. Mild Steel 73HRC.

Hardness is a measure of a materials resistance to localized plastic deformation eg. The purpose of the following experiments is to study the hardness of different types of materials and to understand the significance of this property in materials. Rockwell hardness testing machine.

The results obtained showed that the aluminum sample HB of 1173559 kgmm2 has a higher hardness than the steel sample HB of 11060855 kgmm2. B Select suitable indentor weights according. HB 2F πD D- D-d Here.

P DD D D. Subsequently the diameter of the impression on the sample was measured by a vernier caliper and then repeated three times to reduce the error in the experiment and the average value was obtained. One of the most popular hardness testing methods Brinell Hardness Number is obtained using a perfectly spherical hardened steel ball of 10 mm pressed against the test surface using a static force of 3000 kg 2942 kiloNewton for at least 10 seconds for steel and measuring.

4 A For first reading. By the curved surface area of the indentation which is actually a segment of sphere. Where h mm is the depth of indentation D mm is the diameter of the ball.

Hardness Testing Lab Report study the hardness of different types of materials and to understand the significance of this property in materials. Ad Download or Email Hardness Test Report More Fillable Forms Register and Subscribe Now. 𝐷 𝐷2 𝑑2 Where F is Applied force N D Diameter of indenter d Diameter of indentation A well-structured Brinell hardness number reveals the test conditions and looks like this 75 HB 1050030 which means that a Brinell Hardness of 75 was obtained using a 10mm diameter hardened steel with a 500 kg load applied for a period of 30 seconds.

As seen in the theory previously presented this implies that aluminum is more resistant to. F is the load applied. RESULTS DISCUSSION Results Parameters First Reading Second Reading Third Reading D1 µm 1531 1517 1535 D2 µm 1590 1517 1535 Hardness HV 1523 1611 1574 Average Hardness HV 1569 Calculations Vickers hardness number is designated by HV where P Load in kg and d1 Arithmetic mean of the two diagonals D1 and D2 in mm.

The hardness of materials are test by pressing a steel ball or tungsten carbide ball for a time of 10 to 15 seconds into the surface of specimen by a standard load F kgf. After that the diameter of the indentation d mm is measured when the load is removed. Professor Lindsay Corneal October 27 2016 Abstract The purpose of this experiment were to utilize the hardness as an index of mechanical properties to relate the mechanical properties of ferrous and metal to.

A small dent or a scratchRockwell and Brinell are popular hardness testing methods In a hardness test a small indenter is forced into the surface of a material to be tested and the size or depth of the resulting indentation is measures which in turn is related to a hardness number. Ad Download or Email Hardness Test Report More Fillable Forms Register and Subscribe Now. The hardness test is a mechanical test for material properties which are used in engineering design analysis of structures and materials development.

Cavity diameter measured from the Brinell hardness machine is converted into the Brinell hardness number by the help of following formula. For hard materials diamond cone indenter with C scale black. Graduation is used applying major loa d up to 100Kg.

The results should contain. The Brinell hardness number HB is obtained by dividing the size of the load applied by the surface area of the spherical indentation A mm2. Ad signNow allows users to edit sign fill and share all type of documents online.

The materials and the aforesaid property have significant use in civil engineering. For soft materials ball 116 indenter with B scale brown. The force applied by the hardness tester is set to 10kN and pressure applied to the specimen metal for 10 seconds.

1 Tables recording the readings and hardness number of all the specimens refer to the Log Sheet 2 Plot of Hardness v Carbon Content for the Plain Carbon Steel for each hardness test. Create Legally Binding Electronic Signatures on Any Device. In this lab we will be determining the indentation hardness of four different metals Aluminum 7075 T-24 Aluminum 6061 T-6 AISI Steel 1045 and AISI Steel 1018.

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