In: Mechanical Engineering
A technician has learned all techniques and skills for material processing. But he has never learned material science. Now he wants to find a material that its weight is as light as aluminum and its tensile strength is as high as steel. So he comes to TTU for instruction. You, as an instructor, need to explain to him what material he can select, and what procedure/s he should undertake to approach the goal with minimal explanation (as brief as possible) on the reason/mechanism related to your suggestion.
As per the given task, material should have high strength to weight ratio. The unit for the same is kN. m / kg.
This ratio should be consider while selecting such criteria ( lighter weight with good enough strength)
Below are few material with strength to weight ratio :
Material | strength to weight ratio ( kN m/ kg) |
AL | 115 |
Al alloy | 204 |
stainless steel | 60 |
brass | 67 |
Titanium | 76 |
Titanium alloy | 260 |
copper | 24 |
Glass fiber | 1300 |
Carbon fiber | 2450 |
You can compare this ratio. This ratio shows relative higher strength with less weight.
Obviously higher the ratio, better the material.
You can also see from table that some alloy shows higher value of this ratio. so select proper alloy can also serve good for our application.
Thanks !!!!