Journal• ISSN: 1529-8159
Practical Failure Analysis
Springer Science+Business Media
About: Practical Failure Analysis is an academic journal. The journal publishes majorly in the area(s): Solid mechanics & Corrosion. Over the lifetime, 127 publications have been published receiving 731 citations.
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Papers
TL;DR: In this article, a calculated Creq to Nieq ratio of 1.52 to 1.9 is recommended to control the primary mode of solidification and prevent solidification cracks in type 304L while the Creq/Nieq ratios are calculated for type 316L stainless steel.
Abstract: The susceptibility of austenitic stainless steels to the formation of two distinct weld defects, solidification cracking and lack of penetration, is related to the chemical composition of the base and filler material. The propensity for cracking is determined primarily by the solidification mode and the amount of residual tramp elements such as phosphorous and sulfur. High sulfur levels can lead to weld centerline cracking and heat affected zone (HAZ) cracking while very low sulfur levels (less than ∼50 ppm) in types 304L and 316L are associated with lack of penetration weld defects and a distinct loss in puddle control during fusion welding. A calculated Creq to Nieq ratio of 1.52 to 1.9 is recommended to control the primary mode of solidification and prevent solidification cracks in type 304L while the Creq/Nieq ratio of 1.42 to 1.9 is recommended for type 316L stainless steel. A lower limit of 50 ppm sulfur is recommended to avoid possible lack of penetration. These ranges should be validated by welding trials for specific weld processes and applications.
71 citations
TL;DR: In this article, a review of the principal defects that lead to in-process and in-service failures of brass rods and related components is presented, focusing on defects caused by selected metalforming processes for the production of brass rod (extrusion and cold drawing).
Abstract: Brass rods (mainly C36000, C38500, and C37700) are used in a great variety of applications, from machine component/hydraulic part manufacturing to architecture and fine arts. The chemical composition of these alloys is carefully designed to enhance machinability and/or hot formability (for free machining and hot stamping operations, respectively). This article reviews the principal defects that lead to in-process and in-service failures of brass rods and related components. The review is focused on defects caused by selected metalforming processes for the production of brass rods (extrusion and cold drawing) and on the role of these defects in failures during component processing and use.
37 citations
TL;DR: In this paper, examples of failures of engineering components by stress-corrosion cracking, corrosion-fatigue, hydrogen embrittlement, liquid-metal embrittlements, and solid-metal brittleness are described, which illustrate how fractographic characteristics, analysis of films and deposits on fracture surfaces, and other factors help in diagnosing the modes and causes of failures.
Abstract: Examples of failures of engineering components by stress-corrosion cracking, corrosion-fatigue, hydrogen embrittlement, liquid-metal embrittlement, and solid-metal embrittlement are described. Causes of failure include inappropriate materials selection or heat treatment, poor design, and high residual stresses. The examples illustrate how fractographic characteristics, analysis of films and deposits on fracture surfaces, and other factors help in diagnosing the modes and causes of failures, thereby enabling the appropriate remedial measures to be taken.
33 citations
TL;DR: Nondestructive evaluation is a powerful tool that can help assure safety, quality, and reliability; increase productivity; decrease liability; protect the environment; and save money as discussed by the authors. But, it is difficult to evaluate the quality of an object.
Abstract: ondestructive evaluation is described as nondestructive testing (NDT), nondestructive inspection (NDI), and nondestructive examination (NDE). The activities associated with the evaluation include testing, inspection, and examination and primarily involve looking at (or through) and/or measuring some characteristic of an object. Frequently there is a desire to determine some characteristic of the object or to determine whether the object contains irregularities, discontinuities, or flaws. These examinations, inspections, or tests are used to determine the physical soundness of a material without impairing its usefulness. Nondestructive evaluation is a powerful tool that can help assure safety, quality, and reliability; increase productivity; decrease liability; protect the environment; and save money. In this article, nondestructive evaluation is represented by the acronym NDE.
29 citations
TL;DR: In the field of failure analysis, the investigator must have a sound background in the areas that are central to testing and analytical work and must also be knowledgeable enough to know when to call on other fields of specialization that interface with the work.
Abstract: Performing failure analyses is an exceptionally challenging and exciting job. The investigator must have a sound background in the areas that are central to testing and analytical work and must also be knowledgeable enough to know when to call on other fields of specialization that interface with the work. New problems are always encountered that tax the ingenuity of the investigator, and they will sharpen and expand ones skills if we are willing to go on learning. By the same token, analysis of failures by many investigators in the ferrous and nonferrous metal industries here and abroad has, over the years, expanded the practical knowledge for processing and product developments and also contributed to basic scientific insights.
20 citations
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Performance Metrics
| Year | Papers |
|---|---|
| 2003 | 43 |
| 2002 | 43 |
| 2001 | 41 |