1-20 of 66 Search Results for

heat input control

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c0046998
EISBN: 978-1-62708-232-7
...) severe local overheating at the same location. Recommendations included replacing all tubes using a low sulfur refractory cement in installation and controlling burner positioning and regulation more closely to avoid excessive heat input at the hearth level. Heat treating furnaces Overheating...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001349
EISBN: 978-1-62708-215-0
... metal indicated severe sensitization in the HAZ due to high heat input during welding. An intergranular corrosion test confirmed the observations. The severe sensitization was coupled with residual stresses and exposure of the assembly to a coastal atmosphere during storage prior to installation...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003503
EISBN: 978-1-62708-180-1
... scalded 3. Does not open fully Burner not fully on Water heats slowly or does not reach desired temperature 4. Does not respond to controller—stays open (Same as 2) (Same as 2) 5. Does not respond to controller—stays closed (Same as 1) (Same as 1) 6. Gas leaks through valve Burner...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001837
EISBN: 978-1-62708-241-9
... 7 mm than the adjacent crack-free HAZ, i.e. approximately 6 mm. As the size of the HAZ is primarily controlled by the magnitude of the weld heat input, therefore it seems that the increase in the size of the cracked HAZ was the result of either increased weld heat input or low welding speed causing...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
... for weldment failure include: Inappropriate joint design Improper weld size Unfavorable heat input Improper preweld and postweld heating Improper fit-up Incorrect parent (base) material composition Incorrect filler composition Embrittlement during welding Unfavorable cooling rate...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001816
EISBN: 978-1-62708-180-1
.... Fig. 2 Weld defect (lack of fusion). This defect did not cause a failure even after 27 years in a reheater. Failures Involving Sudden Tube Rupture In the basic design of a boiler, the heat input from the combustion of fuel is balanced by the formation of steam in the furnace...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001788
EISBN: 978-1-62708-241-9
... by attaining improved mechanical properties and distortion control during heat treatment . Work done by Ohio State University and Case Western Reserve University for US Department of Energy , Washington DC ( 1995 ) 10.2172/434855 10. Lee G.-A. , Im Y.-T. : Finite-element investigation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001901
EISBN: 978-1-62708-218-1
... calorimetry (DSC) are the two most widely used thermal analysis methods for polymers. In DSC, sample and reference pans are heated in a controlled environment at a programmable rate so that the pre-weighed sample and the reference materials are always maintained at equivalent temperatures. Because the amount...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003523
EISBN: 978-1-62708-180-1
... information regarding the accident. Loss and/or disposal of key evidence often occurs shortly after an accident occurs. All of the topics discussed in this section point to the need for accident-scene control after an accident. Any changes that occur to an accident scene only make the subsequent accident...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001647
EISBN: 978-1-62708-235-8
... containers and were also intended to identify any gas contaminant or pressure transient that might lead to porosity. Two welds were made with increased heat input, accomplished through placing a second closure weld on top of the first weld, to maximize the likelihood of detecting any contaminant released...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006772
EISBN: 978-1-62708-295-2
... Often, parts/evidence from an accident scene require a more detailed inspection than can be adequately performed at the scene. Many benefits can be obtained by performing an inspection at a location away from the accident scene in a controlled setting. Benefits include: Improved examination...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003518
EISBN: 978-1-62708-180-1
... treat line, to make process more robust. Design phase Designer does not know accuracy of hardness test and specifies a range that is too narrow to achieve. Heat treater is blamed for poor process control. Designer reviews specifications, and broadens specification if that is acceptable, based...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
... with a Thermal Vector Case #7: Feed Pump Motor with Thermal Vector Case #8: Cracked Rotor Bars Case #9: Cracked End Rings Case #10: Rotor Eccentricity Case #11: Loose Base Case #12: A DC Motor and Bad SCR's (Silicon Controlled Rectifiers) Case #13: DC Motor Overheating Due to Unstable...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006754
EISBN: 978-1-62708-295-2
... and specifies a range that is too narrow to achieve. Heat treater is blamed for poor process control. Designer reviews specifications, and broadens specification if that is acceptable, based on performance criteria, or modifies design as required. Manufacturing phase Part loader malfunctions, and a small...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001595
EISBN: 978-1-62708-235-8
...Abstract Abstract Hardenability evaluation is typically applied to heat treatment process control, but can also augment standard metallurgical failure analysis techniques for steel components. A comprehensive understanding of steel hardenability is an essential complement to the skills...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001686
EISBN: 978-1-62708-220-4
... A as the heat transfer fluid. Design conditions are based on annular fluid flow to cool the coil wall. NDE, metallographic and fractographic examinations were performed. Numerous, circumferentially oriented, OD initiating cracks were found near the crown for two coils near the non-fired end of the vaporizer...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001358
EISBN: 978-1-62708-215-0
...× Seven experimental welds were made on one of the broken vanes using different filler metals and postweld stress-relief temperatures. The same welding parameters (heat input, electrode size, etc.) were used for each experimental weld. Table 1 shows average microhardness results for the weld metal, HAZ...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
... and may vary by orders of magnitude with the alloy composition and heat treatment, pH, and electrochemical potential. Independence of the driving force indicates that the crack growth rate is controlled by the rate of a chemical reaction, the rate of supply of the embrittling anion or cation to the crack...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001561
EISBN: 978-1-62708-229-7
... on the base material, as the degree of material sensitization is a cumulation of the material's prior thermal and mechanical treatments, weld cycle history, (# passes, heat input, etc.) material chemistry, thickness and thermal conductivity, and time at temperatures in the sensitization range. Residual...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001818
EISBN: 978-1-62708-241-9
... functioning of temperature controller must be ensured to avoid excessive rise of temperature in the heating chamber. The authors are thankful to the ONGC management for providing the necessary infrastructure for carrying out the analysis and its gracious approval for publication of this article. ...