Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN: 9781305494695
Author: Larry Jeffus
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 27, Problem 15R
Why are high-carbon steels preheated before welding?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
A converging elbow (see the figure below) turns water through an angle of 135° in a vertical plane. The flow cross section diameter is
400 mm at the elbow inlet, section (1), and 200 mm at the elbow outlet, section (2). The elbow flow passage volume is 0.2 m³ between
sections (1) and (2). The water volume flowrate is 0.1 m³/s and the elbow inlet and outlet pressures are 140 kPa and 90 kPa. The elbow
mass is 11 kg. Calculate the (a) horizontal (x direction) and (b) vertical (z direction) anchoring forces required to hold the elbow in
place.
D₂-
Section
(1)-
D₁ = 400 mm
135°
200 mm
Section (2)
(a) Fx= i
20809.96
N
(b) Fz= i
-120265
N
2: A rectangular aluminum block is loaded uniformly in three directions. The loadings are as follows:a 50 kN total resulting compressive load in the x-direction, a 200 kPa uniformly distributed tensile load in they-direction, and a 0.03 MN total resulting tensile load in the z-direction. The block has the following dimensions:L = 1 m, b = 20 cm, h = 350 mm. Use E = 70 GPa and ν = 0.25.Determine the strain in the x and y axes respectively. For the strain in the y-direction to be equal to 0, how much uniformly distributed load inthe surface of y-direction should be added? (+ for tensile, - for compressive)
Answers:
5 -1.122 x10-5 / 3 decimals
6 5.102 x10-6 / 3 decimals
7 -0.357 MPa / 3 decimals
A spherical balloon with a diameter of 9 m is filled with water vapour at 200˚C and 200 kPa. Determine the mass of water in the balloon. The R value for water is 0.4615 kJ/kg∙K.
Chapter 27 Solutions
Welding: Principles and Applications (MindTap Course List)
Ch. 27 - What is meant when a metal is said to have good...Ch. 27 - What does the term weldability involve?Ch. 27 - What properties of a metal can be affected by the...Ch. 27 - Referring to Table 27-2, what commercial joining...Ch. 27 - Referring to Table 27-2, what commercial joining...Ch. 27 - Referring to Table 27-2, what types of metals can...Ch. 27 - What two organizations have developed systems for...Ch. 27 - Explain the steel classification number 1030.Ch. 27 - Referring to Table 27-3, what is the composition...Ch. 27 - What is the maximum allowable percentage of...
Ch. 27 - According to Table 27-4, at what level of carbon...Ch. 27 - What factors other than carbon affect a steel's...Ch. 27 - Why would some low-carbon steels have severe...Ch. 27 - What must be done to steels before welding and...Ch. 27 - Why are high-carbon steels preheated before...Ch. 27 - Explain how to weld tool steel with the oxyfuel...Ch. 27 - Why must cracks in the martensite layer of...Ch. 27 - Prob. 18RCh. 27 - What problems can occur to stainless steel as it...Ch. 27 - Why should stainless steel not be held at a...Ch. 27 - What are the different uses for the three types of...Ch. 27 - Referring to Table 27-6, what diameter SMA welding...Ch. 27 - Why must cast iron weld metal be ductile?Ch. 27 - Why should copper be welded with high currents and...Ch. 27 - Why can't aluminum oxide be melted off aluminum?Ch. 27 - Why are aluminum welds likely to cause distortion...Ch. 27 - Prob. 27RCh. 27 - What do the letters and numbers in a magnesium...Ch. 27 - How can a part be cleaned before it is welded?Ch. 27 - How can a spark test be used to identify metals?
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Correct answers are written below. Detailed and correct solution only with fbd. I will upvote. 1: A 3 m alloy shaft fixed at one end has a torsional shearing stress capacity of 55 MPa. Due to improper fabrication, its cross-sectionalarea has become irregularly shaped. Its effective polar moment of inertia has become 2 x10-7 m4, and the maximum torque stress acts at 7.5 cm fromthe center of the shaft.[1]: If the shaft is to be replaced by a properly manufactured solid circular shaft that has a maximumshearing stress capacity of 70 MN/m2, what is the minimum diameter required so it can withstand the sameload? [2]: Calculate the thickness of a hollow circular shaft with the same outside diameter calculated initem [1] that can carry the same load. Limit the maximum shearing stress of the hollow circular shaft to0.09 GPa.Determine the angle of twist on the free end of the shaft. Use G = 150 x103 GPa. [3]: Use the solidcircular shaft from [1] and use the hollow circular shaft from [2].…arrow_forwardtwo closed 1 m3 chambers are filled with fluid at 25˚C and 1 atm. One is filled with pure carbon dioxide and one is filled with pure water. Only considering the weight of the fluids, which chamber is heavier?arrow_forwardCorrect answers are written below. Detailed and correct solution only with fbd. I will upvote. 1: A 3 m alloy shaft fixed at one end has a torsional shearing stress capacity of 55 MPa. Due to improper fabrication, its cross-sectionalarea has become irregularly shaped. Its effective polar moment of inertia has become 2 x10-7 m4, and the maximum torque stress acts at 7.5 cm fromthe center of the shaft.[1]: If the shaft is to be replaced by a properly manufactured solid circular shaft that has a maximumshearing stress capacity of 70 MN/m2, what is the minimum diameter required so it can withstand the sameload? [2]: Calculate the thickness of a hollow circular shaft with the same outside diameter calculated initem [1] that can carry the same load. Limit the maximum shearing stress of the hollow circular shaft to0.09 GPa.Determine the angle of twist on the free end of the shaft. Use G = 150 x103 GPa. [3]: Use the solidcircular shaft from [1] and use the hollow circular shaft from [2].…arrow_forward
- In using the bolt cutter shown, a worker applies two forces P to the handles. If the magnitude ofP is 500 N, determine the magnitude of the forces exerted by the cutter on the boltarrow_forwardArterioles bifurcate (i.e., split) into capillaries in the circulatory system. Blood flows at a velocity of 20 cm/s through an arteriole with a diameter of 0.20 cm. This vessel bifurcates into two vessels: one with a diameter of 0.17 cm and a blood flow velocity of 18 cm/sec, and one with a diameter of 0.15 cm. Each of these two vessels splits again. The 0.17-cm diameter vessel splits into two vessels, each with a diameter of 0.15 cm. The 0.15-cm diameter vessel splits into two vessels, each with a diameter of 0.12 cm. Determine the mass flow rate and velocity of blood in each of the four vessels at the end of the arteriole bifurcations. You may need to set up several systems, each with a different system boundary, in order to solve this problem.arrow_forward6) Draw a Front, side and Top view for the following objects: p.s. you don't need to label the alphabet ISOMETRIC PICTORIAL VIEW K R C B E R D 0 Aarrow_forward
- Please draw the front top and side view for the following objectarrow_forwardDraw the top viewarrow_forwardSuppose that a steel of eutectoid composition is cooled to 675°C (1250°F) from 760°C (1400°F) in less than 0.5 s and held at this temperature. (a) How long will it take for the austenite-topearlite reaction to go to 50% completion? To 100% completion? (b) Estimate the hardness of the alloy that has completely transformed to pearlite.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Welding: Principles and Applications (MindTap Cou...Mechanical EngineeringISBN:9781305494695Author:Larry JeffusPublisher:Cengage Learning
Welding: Principles and Applications (MindTap Cou...
Mechanical Engineering
ISBN:9781305494695
Author:Larry Jeffus
Publisher:Cengage Learning
Introduction to Ferrous and Non-Ferrous Metals.; Author: Vincent Ryan;https://www.youtube.com/watch?v=zwnblxXyERE;License: Standard Youtube License