Question

In: Mechanical Engineering

Explain the different regions of heat affected zone obtained in welding of Martensitic stainless steel (not...

Explain the different regions of heat affected zone obtained in welding of Martensitic stainless steel (not mild steel)

Note: Kindly give the answer in details for Higher education assignment purpose.

Solutions

Expert Solution

The phase transformation and mechanical properties in the weld heat-affected zone (HAZ) of a reduced activation ferritic/martensitic steel were explored. The samples for HAZs were prepared using a Gleeble simulator at different heat inputs. The base steel consisted of tempered martensite and carbides through quenching and tempering treatment, whereas the HAZs consisted of martensite, δ-ferrite, and a small volume of autotempered martensite. The prior austenite grain size, lath width of martensite, and δ-ferrite fraction in the HAZs increased with increase in the heat input. The mechanical properties were evaluated using Vickers hardness and Charpy V-notch impact test. The Vickers hardness in the HAZs was higher than that in the base steel but did not change noticeably with increase in the heat input. The HAZs showed poor impact property due to the formation of martensite and δ-ferrite as compared to the base steel. In addition, the impact property of the HAZs deteriorated more with the increase in the heat input. Post weld heat treatment contributed to improve the impact property of the HAZs through the formation of tempered martensite, but the impact property of the HAZs remained lower than that of base steel.


Related Solutions

Explain different types of welding?
Explain different types of welding?
As part of a heat treatment process, cylindrical, 304 stainless steel rods of 100-mm diameter are...
As part of a heat treatment process, cylindrical, 304 stainless steel rods of 100-mm diameter are cooled from an initial temperature of 500ºC by suspending them in an oil bath at 25ºC. If a convection coefficient of 500 W/m2·K is maintained by circulation of the oil, how long does it take for the centerline of a rod to reach a temperature of 52ºC, at which point it is withdrawn from the bath? If 9 rods of length 1 m are...
As part of a heat treatment process, cylindrical, 304 stainless steel rods of 100 mm diameter...
As part of a heat treatment process, cylindrical, 304 stainless steel rods of 100 mm diameter are cooled from an initial temperature of 500°C by suspending them in an oil bath at 30°C. If a convection coefficient of 500 W/m2K is maintained by circulation of the oil, how long does it take for the centerline of a rod to reach a temperature of 50°C, at which point it is withdrawn from the bath? If 10 rods of length L =...
Describe and sketch a weld cross section including the weld metal, heat affected zone, and base...
Describe and sketch a weld cross section including the weld metal, heat affected zone, and base metal on cold worked material. In the heat affected zone, make sure to label what is happening as the distance increases from the weld.
1) Be able to explain stainless steel sensitization and dezincification in brass as an example of...
1) Be able to explain stainless steel sensitization and dezincification in brass as an example of a composition cell. 2) Know and understand the galvanic/electromotive series and the basic elements necessary for electrochemical corrosion. That is, what is necessary and how does a galvanic cell operate.
Describe applications of the Type 304L stainless steel (Fe) and explain beneficial effect of alloying with...
Describe applications of the Type 304L stainless steel (Fe) and explain beneficial effect of alloying with particular alloying elements (or change in microstructure) which change structure or properties
Research and explain more about carbon and heat treatment effects on steel.
Research and explain more about carbon and heat treatment effects on steel.
There are steel samples having exactly same composition but exhibit totally different hardness. Illustrate the heat...
There are steel samples having exactly same composition but exhibit totally different hardness. Illustrate the heat treatment of steel (at least four different procedures) that evidently change the microstructure and consequently its hardness?
Name and briefly explain different heat treatment operations carried on steels.
Name and briefly explain different heat treatment operations carried on steels.
1. Define the four types of chips observed in machining. Explain how different chips are obtained...
1. Define the four types of chips observed in machining. Explain how different chips are obtained from materials of different ductility. 2. According to the Merchant Equation, an increase in rake angle would have which of the following results, if all remaining factors are constant (more than one correct answer): a. Decrease in friction angle b. Decrease in power requirements c. Decrease in shear plane angle d. Increase in cutting temperature e. Increase in shear plane angle 3. State and...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT