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Soldered joints

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001441
EISBN: 978-1-62708-220-4
... Abstract Soft-soldered copper pipe joints used in refrigerating plants failed. The solder had not adhered uniformly to the pipe surface. In addition, there were some longitudinal grooves on the pipe surfaces, parts of which were not filled with solder. The unsoldered areas formed cavities...
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Published: 30 August 2021
Fig. 5 Schematic diagram and failure modes of a solder joint. IMC, intermetallic compound; PCB, printed circuit board More
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Published: 30 August 2021
Fig. 6 Simplified one-dimensional expression of a solder joint series stiffness system More
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Published: 30 August 2021
Fig. 9 Typical head-in-pillow defect of solder joint. Source: Ref 23 . Courtesy of Springer Nature More
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Published: 30 August 2021
Fig. 11 Formation of a cold-soldered joint caused by warpage. PCB, printed circuit board; BGA, ball grid array More
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Published: 30 August 2021
Fig. 12 Void in a solder joint More
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Published: 30 August 2021
Fig. 18 Intermetallic compound brittle failure of a solder joint. PCB, printed circuit board More
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006827
EISBN: 978-1-62708-329-4
... Abstract Due to the recent requirement of higher integration density, solder joints are getting smaller in electronic product assemblies, which makes the joints more vulnerable to failure. Thus, the root-cause failure analysis for the solder joints becomes important to prevent failure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001234
EISBN: 978-1-62708-232-7
... Abstract In a copper hot water system, a bent pipe was soldered into a straight pipe with twice the diameter. The neighborhood of the soldered joint was covered with corrosion product predominantly blue-green in color, presumably carbonates. When these corrosion products were scratched off...
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Published: 01 December 1993
Fig. 9 Delaminated termination on a group 6 sample, showing Valox (the pellet encapsulant) intruding on the cermet/polymer thick-film metallization interface. Metallization forced the expansion of the termination, rupturing the nickel barrier and giving the solder joint a cracked appearance More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001132
EISBN: 978-1-62708-214-3
... environment. On this basis, it was concluded that creep of the solder alloy was the most probable cause of failure. Creep (materials) Fire protection Soldered joints Solders Solder alloy Creep fracture/stress rupture Background A sprinkler head unit that was installed in a smoking lounge...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001180
EISBN: 978-1-62708-219-8
... and, top left, streamers from the soldered joint. Fig. 2 Polished specimen from the site of the fracture etched with ammonium persulphate showing branched transcrystalline cracks lying to the right of the main crack visible in Fig. 1 . 200 ├Ś This appearance indicates disintegration by stress...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001391
EISBN: 978-1-62708-215-0
... entire termination failure. The attachment never broke within the solder joints. Rather, the termination consistently came apart from the substrate. Pertinent Specifications A chip detail drawing ( Fig. 1 ) indicated that the chip substrate was high-purity alumina. The resistive element...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001440
EISBN: 978-1-62708-235-8
...-on patch plate or to employ one of the high-strength, non-metallic adhesives. Explosions Gas cylinders Soldered joints Tensile stress 50Pb-50Sn Plate steel Intergranular fracture Liquid metal induced embrittlement Reference is made in other cases in this series of Reports to failures...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001843
EISBN: 978-1-62708-241-9
... consistency to a lead-free tin solder joint, along with a ready lack of any signs of corrosion (e.g., no oxygen evident during SEM/EDS examination), could strongly suggest the presence of tin pest. If tin pest is considered as a failure mode, then XRD is the most useful tool for conclusively determining its...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0089722
EISBN: 978-1-62708-217-4
... as the result of vibration and inadequate support of the hose assembly. Recommendations included changing the joint design from a cylindrical lap joint to a square-groove butt joint. Also, an additional support was recommended for the hose assembly to minimize vibration at the elbow. Aircraft components...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089738
EISBN: 978-1-62708-235-8
... that the crack in the header tube was the result of a stress concentration at the toe of the weld joining a doubler collar to the tube. The stress concentration was caused by undercutting from poor welding technique and an unfavorable joint design that did not permit a good fit-up. Recommendations included...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006764
EISBN: 978-1-62708-295-2
... input, and high-resolution instrument. IR systems are sensitive to surface emissivity. Rapid examination of large areas. Can be adapted to production inspections Circuit board solder joints, solar cells, heat-transfer equipment, metals, composites, concrete Sonic IR/vibro-thermography, inductive IR...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0047529
EISBN: 978-1-62708-230-3
... Abstract A weld that attached the head to the shell of a preheater containing steam at 1.4 MPa (200 psi) and was used in the manufacture of paper cracked in service. The original joint contained a 6.4 by 50 mm backing ring that had been tack welded to the inside surface of the shell...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0089730
EISBN: 978-1-62708-233-4
... Abstract Stainless steel liners (AISI type 321) used in bellows-type expansion joints in a duct assembly installed in a low-pressure nitrogen gas system failed in service. The duct assembly consisted of two expansion joints connected by a 32 cm (12 in.) OD pipe of ASTM A106 grade B steel...