Answer / laxmi

superalloys is an alloy that exhibits excellent mechanical
strength and creep resistance at high temperatures, good
surface .

Answer / yesm

superalloys are use for high temp.application.

Answer / vishalshah007

super alloy is a metallic alloy with high mechanical
strength & resistance to surface degradation at high temp
(above 650'c).

Typically having a matrix with an austenitic, FCC crystal
structure.

Stable alloy with resistance to deformation & high
temperature strength.

In superalloys, oxidation & corrosion resistance is provided
by formation of protective oxide layer which is formed when
the metal get exposed to oxygen & encapsulates the material
& thus protecting the rest of component

Moat important strenthning mechanism is through the
formation of secondary phase precipitates such as gamma
prime and carbides through precipitation strenthening.

The 3 major classes of super alloys are:
~Nickel based super aloys
~Iron based super alloys
~Cobalt based super aloys


thank you..

How can Residual stresses in superalloy components can be minimised?

1 Answers  

---

What is tack welding ?

0 Answers   Essar,

---

Is there a possibility of inducing stress cracking in an insulated stainless road tanker vessel (20 tonne capacity) if the vessel is subject to rapid filling (10 tonne /hr) with liquid methane (-160 c) assuming the vessel is at ambient. If so, where could I obtain suggested cooling rates?

0 Answers  

---

What is the specific speed of a pump ?

0 Answers   NIC,

---

Why we are doing post heating in alloy steel welding?

0 Answers  

---

Which liquid can dissolve gold?

0 Answers  

---

Discuss steam engines. What is its overall efficiency ?

0 Answers   Essar,

---

Define what is the metallurgy use? Define what is the casting and forging?

0 Answers  

---

How is solution annealing carried out? What type of furnace is required?

0 Answers  

---

Why same casting has different hardness and machine-ability properties?

0 Answers  

---

Define what is the difference between plaster used in gold investment casting and ceramic used in the process of investment casting of automobile engine parts and turbine blades etc. When both are used in the lost-wax method?

0 Answers  

---

What is iron ferrite and what is it used for, and where is it found?

0 Answers  

---