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microsegregation

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Published: 01 December 1993
Fig. 20 Detailed view of microsegregation observed on tooth F-23. Nital etch. 14.8× More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001167
EISBN: 978-1-62708-228-0
... pearlite aligned in bands along the longitudinal direction of the pipe. The pearlite grains occur in lean alloy microsegregation bands where local hardenability is low. The structure, shown in Fig. 5 , is typical of a low alloy hardenable steel in the normalised condition, Fig. 5 Upper bainitic...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003510
EISBN: 978-1-62708-180-1
..., and 1144. As a rule, steels with carbon contents and hardenability greater than 1037 are difficult to water quench ( Ref 22 ). Some steel grades with high manganese are prone to microsegregation of manganese, gross segregation of chromium, and thus are prone to cracking. These include 1340, 1345, 1536...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001301
EISBN: 978-1-62708-215-0
... in the immediate vicinity of the suspected fracture origin on tooth F-23. In the etched condition, the structure at this location showed evidence that segregation occurred during solidification ( Fig. 20 ). Fig. 20 Detailed view of microsegregation observed on tooth F-23. Nital etch. 14.8...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001111
EISBN: 978-1-62708-214-3
.... Additionally, by means of electron microprobe analysis, it was found that microsegregation of titanium, sulphur and manganese occurred in the dendrite interstices of the crack surface. The microsegregation of titanium and manganese in combination with sulfur can be expected to broaden the temperature range...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006826
EISBN: 978-1-62708-329-4
..., or calcium can be added to hypoeutectic aluminum-silicon alloys to progressively change the silicon lamellae into rounded particles, and phosphorus refines the size of silicon particles in hypereutectic aluminum-silicon alloys ( Ref 26 ). Microsegregation in wrought alloys is a microstructural defect...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001775
EISBN: 978-1-62708-241-9
... and stereoscopic examination of the internal (gas-side) and external surfaces of the tube, chemical and metallographic analysis of the alloy, determination of crack propagation mode (intergranular or transgranular), and estimation of the local chemical composition and microsegregation at grain boundaries. Chemical...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
.... Consequently, the dendrite arms are stronger and, on working, do not deform and flow as readily as the matrix in which they are incorporated. Microsegregation characterizes concentrations of elements in interdendritic regions that range in size from a few to several hundred micrometers. By contrast...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... segregate during solidification. The variable distribution of chemical composition on the microscopic level in a microstructure, such as dendrites and grains, is referred to as microsegregation. Variation on the macroscopic level is called macrosegregation. Microsegregation characterizes concentrations...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
..., such as sulfur and phosphorus in steel, than the interdendritic regions. Consequently, the dendrite arms are stronger and, on working, do not deform and flow as readily as the matrix in which they are incorporated. Microsegregation characterizes concentrations of elements in interdendritic regions that range...
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
... material manufacturing Excessive microsegregation causes inability to achieve post heat treat mechanical properties. Material supplier is blamed. Additional investigation is performed on how to improve heat treat line, to make process more robust. Design phase Designer does not know accuracy...
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
... Physical causes and time of occurrence Physical causes Example Likely effects of findings Alternative effect(s) of findings Raw material manufacturing Excessive microsegregation causes inability to achieve post-heat-treatment mechanical properties. Material supplier is blamed...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... Swelling from the melt pool Chemical composition change due to vaporization of elements Alloy microsegregation Surface defects in metal additive manufacturing parts Table 3 Surface defects in metal additive manufacturing parts Weld tracks Protruding unmelted or partially melted...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006808
EISBN: 978-1-62708-329-4