Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 30, Problem 39QLP
To determine
Explain the significance of residual stresses in weldedstructures.
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Chapter 30 Solutions
Manufacturing Engineering & Technology
Ch. 30 - Describe fusion as it relates to welding...Ch. 30 - Explain the features of neutralizing, reducing,...Ch. 30 - What is stick welding?Ch. 30 - Explain the basic principles of arc-welding...Ch. 30 - Why is shielded metal-arc welding a commonly...Ch. 30 - What keeps the weld bead on a steel surface...Ch. 30 - Describe the functions and characteristics of...Ch. 30 - What are the similarities and differences between...Ch. 30 - What properties are useful for a shielding gas?Ch. 30 - What are the advantages to thermit welding?
Ch. 30 - Explain where the energy is obtained in...Ch. 30 - Explain how cutting takes place when an...Ch. 30 - What is the purpose of flux? Why is it not needed...Ch. 30 - What is meant by weld quality? Discuss the...Ch. 30 - How is weldability defined?Ch. 30 - Why are welding electrodes generally coated?Ch. 30 - Describe the common types of discontinuities...Ch. 30 - Prob. 18RQCh. 30 - Explain why hydrogen welding can be used to...Ch. 30 - Prob. 20RQCh. 30 - Prob. 21QLPCh. 30 - It has been noted that heat transfer in gas-metal...Ch. 30 - Explain why some joints may have to be...Ch. 30 - Describe the role of filler metals in welding.Ch. 30 - List the processes that can be performed with...Ch. 30 - What is the effect of the thermal conductivity of...Ch. 30 - Describe the differences between oxyfuel-gas...Ch. 30 - Could you use oxyfuel-gas cutting for a stack of...Ch. 30 - What are the advantages of electron-beam and...Ch. 30 - Describe the methods by which discontinuities...Ch. 30 - Explain the significance of the stiffness of the...Ch. 30 - Prob. 32QLPCh. 30 - Which of the processes described in this chapter...Ch. 30 - Prob. 34QLPCh. 30 - Prob. 35QLPCh. 30 - Comment on the factors involved in electrode...Ch. 30 - Prob. 38QLPCh. 30 - Prob. 39QLPCh. 30 - Prob. 40QLPCh. 30 - Prob. 41QLPCh. 30 - What is weld spatter? What are its sources? How...Ch. 30 - Describe your observations concerning Fig. 30.20.Ch. 30 - Prob. 44QLPCh. 30 - Plot the hardness in Fig. 30.20d as a function of...Ch. 30 - A welding operation will take place on carbon...Ch. 30 - In Fig. 30.26b, assume that most of the top...Ch. 30 - A welding operation takes place on an...Ch. 30 - An arc welding operation is taking place on carbon...Ch. 30 - Comment on workpiece size and shape limitations...Ch. 30 - Arc blow is a phenomenon where the magnetic...Ch. 30 - Review the types of welded joints shown in Fig....Ch. 30 - Comment on the design guidelines given in...Ch. 30 - Prob. 55SDPCh. 30 - Prob. 56SDPCh. 30 - Make a list of welding processes that are suitable...Ch. 30 - Prob. 58SDPCh. 30 - Prob. 59SDPCh. 30 - Review the poor and good joint designs shown...Ch. 30 - In building large ships, there is a need to weld...Ch. 30 - Prob. 62SDPCh. 30 - Comment on whether there are common factors...Ch. 30 - Prob. 64SDPCh. 30 - Lattice booms for cranes are constructed from...Ch. 30 - A common practice in repairing expensive broken...
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- An arc welding operation on nickel performs a groove weld, whose cross-sectional area = 20.0 mm2. The melting point of nickel Tm = 1725° Travel velocity = 4.0 mm/sec. Heat transfer factor = 0.82, and melting factor = 0.70. Determine the rate of heat generation required at the welding source to accomplish this weld.arrow_forwardWhy is cost a consideration in joint design?arrow_forwardFor a cross section of a typical fusion-welded joint: (a) list all types of different zones in the joint and (b) Explain the different types of grain structure that formed during welding of metal.arrow_forward
- What do you understand by the term welded joint? How it differs from riveted joint?arrow_forwardANSWER FAS WITH A SUMMARIZED SOLUTIONarrow_forwardA gas metal arc welding test is performed to determine the value of melting factor f₂ for a certain metal and operation. The welding voltage = 25 volts, current = 125 amps, and heat transfer factor is assumed to be = 0.90, a typical value for GMAW. The rate at which the filler metal is added to the weld is 0.50 in³ per minute, and measurements indicate that the final weld bead consists of 57% filler metal and 43% base metal. The unit melting energy for the metal is known to be 75 Btu/in³. (a) Find the melting factor. (b) What is the travel speed if the cross-sectional area of the weld bead = 0.05 in²?arrow_forward
- Q4 (a) Discuss the differences between fusion and solid state welding.arrow_forwardA circular electrode of 190 mm diameter is used for carrying out seam welding at 5 welds per cm on a mild steel tube of thickness 1.5 mm. The duration of the welding cycle is given as On - 4 cycles, Off- 3 cycles. The power supply is at 50 Hz. Calculate work speed, welds per minutę, RPM, and energy requirement assuming effective resistance between an electrode as 100u ohm.arrow_forwardOutline the principle of Ultra Sonic testing for checking deeply imbedded defects in a welded joint.arrow_forward
- The primary purpose of heat application in deformation based joining processes is *arrow_forwardA mild steel ammonia receiver is a cylinder 2 m in diameter with a pressure load of 1250 kPa and a design stress of 65 MPa. The lap welding tensile strength is 450 MPa and the weld -joint efficiency is assumed to be 100%. Compute the bursting pressure of the receiver in kN/m².arrow_forwardCalculate the heat input of welded Truss if the welding current is 215 amperages, its arc voltage is 21 volts, and 15cm/min. of welding travel speed usage.arrow_forward
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