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heat-affected zone

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Journal Articles
AM&P Technical Articles (2013) 171 (11): 13–18.
Published: 01 November 2013
... transition regime and test specimen geometries when measuring the toughness of weld metal and heat-affected zones. This article identifies several factors that are not fully addressed in most fracture toughness test standards and explains how they may influence calculated values obtained from ferritic...
Journal Articles
AM&P Technical Articles (2012) 170 (9): 24–26.
Published: 01 September 2012
... of shielding gas composition on A508 steel laser welds. base material and not the fusion zone or heat affected zone. Failure of 316L ten- sile specimens occurred in the weld fusion zone. There was negligible dif- ference between the ulti- mate strength of the nitrogen-shielded welds versus the argon- shielded...
Journal Articles
AM&P Technical Articles (2017) 175 (8): 35–36.
Published: 01 November 2017
... are specially heat treated. These materials are intrinsically sensitive to any process or procedure, such as welding or conventional thermal spray, which create a heat affected zone (HAZ) on the substrate. Not only would the material properties in the HAZ become substandard, but the dimensional accuracy...
Journal Articles
AM&P Technical Articles (2020) 178 (6): 43–45.
Published: 01 September 2020
... temperature, for both the metal s surface and its heat affected zone (HAZ). When the laser heat source is removed, the thermal mass of the metal rapidly quenches the heated area by conduction, with the result that the treated part of the metal has the desired hardness. The details of the laser beam s...
Journal Articles
AM&P Technical Articles (2019) 177 (5): 50–51.
Published: 01 July 2019
... before 1937 Alfa Romeo 8C 2900B Touring Berlinetta. finally joining the collection of David and Ginny Sydorick. After winning the 2001 prize for Most Elegant Closed Car at the Pebble Beach Concours d Elegance, the Alfa Romeo earned Best spray, which create heat-affected zones and distortion. Because...
Journal Articles
AM&P Technical Articles (2013) 171 (7): 32–35.
Published: 01 July 2013
... the heat affected zone, and maximizes cutting speed. Single mode fiber lasers with average power of 100500 W are well suited for applications involving stainless steel, nickel, titanium, aluminum, and other grey metals. Figure 4 illustrates the as cut edge quality and smooth surface that laser cutting...
Journal Articles
AM&P Technical Articles (2016) 174 (2): 12–15.
Published: 01 February 2016
...×. such steels are welded, they are susceptible to cold cracking, due to formation of brittle martensite within the weld and reaustenitized heat affected zones (HAZ)[6]. Therefore, these steels must be preheated before welding, after which prolonged isothermal holding treatments are applied to regenerate...
Journal Articles
AM&P Technical Articles (2013) 171 (11): 45–47.
Published: 01 November 2013
..., high hardness, narrow heat affected zone (HAZ), and reduced cracking susceptibility[11, 12]. Among other nonequilibrium processes (e.g., sputter deposition, ion implantation, and vapor deposition), LSM is more beneficial because it does not require high in-process vacuum, can produce complex structures...
Journal Articles
AM&P Technical Articles (2012) 170 (8): 15–19.
Published: 01 August 2012
.... This difference is explained in the following discussion. Figure 13 shows the ferritic grain structure of the wire close to the weld. This image is the transition from the as-cold drawn microstructure and heat-affected zone (note the equiaxed grains that become larger in size as we progress to the right edge...
Journal Articles
AM&P Technical Articles (2013) 171 (9): 59–61.
Published: 01 September 2013
... stabilizer and practically eliminating shape distortion. A smaller heat-affected zone (HAZ) also heating position, the top coil pivots reduces thermal expansion. into a closed position, and power is applied to the bottom coil. Electrical Rotational hardening applies appreciable current flows in the bottom...
Journal Articles
AM&P Technical Articles (2020) 178 (2): 20–24.
Published: 01 February 2020
... in a universal test machine. Charpy V-notch Impact tests with the notch located at the weld centerline were conducted at 20°C and 40°C. Figure 2 shows a macrograph of the cross section of the laser welded joint. Three different zones are observed including the weld zone (WZ), heat-affected zone (HAZ), and base...
Journal Articles
AM&P Technical Articles (2024) 182 (2): 17–19.
Published: 01 March 2024
... therefore be sped up. There has yet cladding process, EHLA creates un- by the powder, but a small percentage to be found a limit to this besides precedented low dilution and small (approximately 20%) reaches the appropriate machine technology to heat affected zones for a fusion based substrate, creating...
Journal Articles
AM&P Technical Articles (2014) 172 (11): 45–47.
Published: 01 November 2014
... for properly measuring hardness of the case and heat affected zone, as well as a review of issues and complications related to different hardness measuring techniques are also included. Case studies of pattern specifications are presented, and special attention is given to proper monitoring of induction...
Journal Articles
AM&P Technical Articles (2015) 173 (2): 32–33.
Published: 01 February 2015
... in the heat-affected zone sits at the ideal temperature for carbide formation. Union Carbide Corp. (UCC) tried using an oxygen lance to reduce the carbon level, but was unsuccessful due to the uncontrolled temperature of the bath. They hired a recent MIT graduate named William A. Krivsky to work on improving...
Journal Articles
AM&P Technical Articles (2014) 172 (11): 26–29.
Published: 01 November 2014
... No recast layer No debris Plasma plume Ultra-short laser pulses No damaged surface Microcracking Heat affected zone No microcracking No melt zone No heat transfer to surrounding material Shock waving Melt zone Heat transfer to surrounding material No shock waving Hot, dense ion/electron soup (i.e., plasma...
Journal Articles
AM&P Technical Articles (2015) 173 (1): 34–37.
Published: 01 January 2015
..., the strength, ductility, and fracture toughness of the weld and heat-affected zone (HAZ) exceed typical code and standards requirements. Reduced weld distortion The primary heating mechanism for the welding arc is radiant heat transfer from the arc plasma to the metal components. A significant amount of energy...
Journal Articles
AM&P Technical Articles (2012) 170 (10): 20–22.
Published: 01 October 2012
... steels, surface replication has severe limitations because the primary creep damage mode is the fine- grained heat-affected zone (Type IV region) of the weld. Creep dam- age starts subsurface, and components can fail with little to no sur- face damage. This led to early erroneous reports that CSEF steels...
Journal Articles
AM&P Technical Articles (2016) 174 (6): 22–24.
Published: 01 June 2016
... deformed. However, using LFW to join single crystal blades and polycrystalline Ni-base superalloys is challenging because the single crystal is difficult to deform. Also, some characteristics of LFW including localized melting, heat-affected zones, material deformation, and micro-cracks near the interface...
Journal Articles
AM&P Technical Articles (2023) 181 (7): 22–24.
Published: 01 October 2023
... application requirements. A further game-changing development in the quest for increased tool longevity and decreased maintenance costs. finding from the examination into the heat-affected zone (HAZ) highlighted CONCLUSION the accuracy and effectiveness of the Additive manufacturing is a par- additive...
Journal Articles
AM&P Technical Articles (2016) 174 (8): 42–45.
Published: 01 September 2016
... the hot and cooling zones for sinter hardening steel parts. Figure 1 shows a typical continuous sintering furnace design. surface hardness and strength, are affected if uncontrolled carburization or decarburization occurs. In a carbon-neutral atmosphere based on nitrogen with hydrogen addition, the actual...