the major disadvantage of hardened steel?
117533
Hardened steel cannot bend like iron, due to it's crystallic structure, if it is forced to bend, it brakes.
941167
What do you want to know?\n\nYou have to heat it beyond a critical temperature, then quench it (cool it fast enough) to harden it. Then you have to temper it (reheat to a lower temperature and slowly cool it) because it will be too brittle when hard.\n\n1045 has no alloy in it, so thicker cross sections will not quench fast enough to get through-hardening. Avoid thick sections, or switch to an alloy steel (41XX or 43XX) in order to accomplish through-hardening.
126299
Yes. You will be work-hardening the rebar at the point of bend. The grain structure begins to refine at that point and becomes increasingly more brittle (less ductile).
536887
Depends on the metal. Most metals generally become brittle. Iron on the addition of Carbon hardens. You may say option 2.
663809
Some information\n\nhttp://www.key-to-steel.com/Articles/Art2.htm\n\nmedia.wiley.com/product_data/ excerpt/61/04713870/0471387061.pdf
436538
well, I'd say the biggest disadvantage is that you may get killed in a war. That pretty much outweighed all of the advantages for me.
893222
Hi. The main advantage is that tempered glass will break into small, roughly cubical pieces. This eliminated a major hazard of having sharp pieces of glass.
73799
Because steel is cheaper and mass produced.
401262
The answer to that depends on your application, you need to decide whether you want hardness, ductility, hardness, hardenability, or any of a number of other characteristics
769099
Iron is stronger and steel of course is stronger still.  Further, iron corrodes only if not cared for.  Copper will form a patina over time even if cared for.
723440
mild steels will almost allways be corroded by HCl and H2SO4.  Depending on the pH and electric potential conditions different oxides and other iron ions will form, but it is very difficult to prevent the corrosion.  in addition, the oxides that will for are generally not adherent meaning they will not stick to the surface and protect the metal.\n\nthe bottom line is except for very rare conditions the steel will corrode and will be eventually completley destroyed, and i'm sure you can imagine what this will do to the properties.  to prevent this, just use an appropriate stainless steel alloy
1039220
no i  dont think so!\nbut it much depends on the formation of martensite!!\nif the the austenitic temp is very high it will be impossible to avoid the nose of the "ttt" diagram during cooling.\nwhich will lead to  the formation of bainte or pearlite!!\n(depends on the composition)\nif we want martensite we will have to have  lower austenitc temp so that  drastic cooling from that temp is possible!and  the formation of martensite is enhanced!!
119996
We all know the disadvantages are death, misery,repression, fright, bodily injuries, rampages, evilness.\nThe advantages would be population control, improved economy for many, advances in technology, employment, nationalism( may unite people who have a common enemy), education about other societies, spreading of ideas.
914141
Any hardened plastic is capable of killing ground to a point and used as an arrow with a bow or crossbow ,the plastic casing used on everday pens is perfect it is hardened to a point all ready someone gets stuck with it it will kill put it back together and you have your pen back
809742
It is both advantageous disadvantage and disadvantageous advantage.  It all depends on how YOU behave in PG level.
212883
Hardening of body tissue.
105033
steel is used most often. Chevy trucks have a hydroformed steel frame that's stronger. some car have aluminum but it's rare and some high performance cars have different material but are expensive and rare