Originally approved in Last previous edition approved in as E–99 DOI: /E 2 For referenced ASTM standards. ASTM E()e1. Standard Practice for Microetching Metals and Alloys. standard by ASTM International, 06/01/ View all product details. Determination of Residual Stresses Numerically Obtained in ASTM AH36 Steel Welded by TIG Process. Pablo Batista Guimarães, Paulo.

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Properly discard after use.

ASTM E407-07 Standard Practice for Microetching Metals and Alloys

Electrolytic at 80 V for 5—30 min. Immerse with gentle agitation 10—60 s.

Stop when surface is dark. The specimen is examined as polished under polarized light. Pure Ni and high Ni alloys, 47, 25,31c 38,50, 50,89,50, 83, 98, 13a 38,50, 25,47, 48b, 94,34 50, 83, 40,74e, 25, 74e, 50, 94,12, 87, 89,25, 94, 13a 19b,22a general structure grain boundary sul?

Experience has shown that the quality of tap water varies signi? Space electrodes 2 cm apart.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. If d is not colored, increase NaOH to 40 g. Swab few seconds to a minute.


Electrolytic at asmt V for 30 s. Use Al, Pb, or stainless steel cathode. Use at 2—20 V dc, 5—20 s, stainless steel cathode. Add nitric acid to lower the pH to 2. Immerse 10—30 min depending on depth of worked metal layer. Make concentration changes on this basis. Follow with electrolytic etch at low current density in same solution. Immerse few seconds to a minute or more.

A selection of useful books on this subject is given in Refs. Lightly pre-etch specimen before use. Swab for 1—3 min. Therefore, a glove must be carefully e40 and used to ensure that it will provide the needed protection for the speci? A vacuum level of 1. Distilled water e470 then slowly added to the wheel and polishing continued until the surface is bright.

ASTM E Standard Practice for Microetching Metals and Alloys_百度文库

Electrolytic at 6 V for few seconds to a minute. Pure Co Hard-facing and tool metals High-temperature alloys 9, 10 11 12, 13c general structure via polarized light general structure general structure 14, 15, 16, 17 aastm, 19, 20 20, 18, 16, 21, 22b, 24, 25 19 general structure general structure general structure phase identi? Stains sigma and chi yellow to red brown, ferrite gray to blue gray, carbides barely d407, austenite not touched. Summary of Practice 4. Colors matrix of Cu alloys.


Add HCl just before use. Will not attack sul? Tends to pit with longer times.

Continued Procedure Electrolytic in Solution A: Use crossed polarized light and sensitive tint to improve coloration.

Additional information can be obtained at the EPA website3. Lightly apply etchant over surface until dark stain develops. Swab for 30 s or longer.

Immerse with gentle agitation 5—30 s. If pitting occurs, reduce voltage. Electrolytic at 3 V for 2—10 s.