Strength vs. Hardness vs. Toughness - Engineering Stack Exchange Hardness is the measure of a material resistance to scratching, like it's hard to drill a hole into, or hard to sand Or diamond that can cut many surfaces but is hard to cut Toughness is the ability of material to resist cracking or breaking under stress Strength is the ability of material to withstand great tension or compression or other
What material property (Youngs modulus, HRC hardness, Max yield . . . Given similar strength and hardness spec, materials that work-harden can be much worse to work with If milling or drilling, some materials form nasty chips compared to others Some have a wear-resistant microstructure (grains of carbides or silicons) and hence eat up the cutting tool faster than others
How do you plot a relation between hardness and strain How do I plot the relation between hardness of a material and compressive strain knowing the stress-strain curve and indentation size in Brinell's hardness test Skip to main content Stack Exchange Network
Surface Finish and Strength - Engineering Stack Exchange Hardness, as indicated by @kamran, will generally be impacted by compressive surface finishing techniques applied, making it harder in the process Stated in @kamran's answer as well, roughening will increase hardness since most roughening methods generally apply some compressive force to steel surfaces
Why are the processes called Precipitation Hardening and Solid . . . Hardness and strength commonly have a positive correlation as the mechanisms which increase a material's hardness typically also increase the material's strength Toughness typically has a negative correlation to hardness Toughness is a measure of a material's ability to resist fracture under load
materials - Durometer and Shore - Engineering Stack Exchange The basic method for hardness measurement is using an indender and a standard force on a material surface and then measuring either the depth or the area of the imprint However, is happening with almost all hardness scales is that you cannot obtain meaningful results for all types of materials, for a given force and a specific indender
What is the Brinell hardness of ATSM A786 steel? One can get a pretty good estimate of the ( minimum ) hardness from conversion charts For example : a minimum tensile of 60 ksi corresponds to a Brinell of about 105 ; a minimum tensile of 100 ksi corresponds to a BHN of 200 The yield strengths do not correlate as well to hardness
Difference between Stiffness (K) and Modulus of Elasticity (E)? "Hardness" - Hardness (antonym: softness) is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion In general, different materials differ in their hardness Its usage is limited to the cases stated above
mechanical engineering - Potential Problems of Excessively Hard Shaft . . . $\begingroup$ "Hardness being a surface property may prevent surface scratches and wear, could it lead to any problems in general?" Hardness is not a surface property, but normally you only care about hardness at the surface, hence case hardened shafts exist which helps you retain the toughness of the bulk material underneath $\endgroup$ –
At what temperature do I risk altering the structure of steel? The second consideration is the tempering temperature This only applies to steels which have been heat treated, generally cutting tools, dies, springs and certain other very high strength hardness parts The tempering range can vary between 180 and 300 C or up to 600C for high speed steels