Installing, Maintaining, And Verifying Your Charpy Impact Machine

By Vigliotti, D. P.

Book Id: WPLBN0000693402
Format Type: PDF eBook:
File Size: 0.8 MB
Reproduction Date: 2005

Title:	Installing, Maintaining, And Verifying Your Charpy Impact Machine
Author:	Vigliotti, D. P.
Volume:
Language:	English
Subject:	Technology., Reference materials, Technology and literature
Collections:	Techonology eBook Collection
Historic Publication Date:
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Citation APA MLA Chicago P. Vigliott, B. D. (n.d.). Installing, Maintaining, And Verifying Your Charpy Impact Machine. Retrieved from http://gutenberg.cc/

Description
Technical Reference Publication

Excerpt
Introduction: The low cost and simple configuration of the Charpy impact test have made it a common requirement in codes and standards for critical structures such as pressure vessels and bridges. For many years, engineers and designers have recognized that materials behave differently when loaded statically than when loaded dynamically, and that a number of materials have a brittle-to-ductile transition temperature. The Charpy impact test is a very cost-effective method of evaluating the behavior of materials for applications where these attributes are important.

Table of Contents
Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 2. Overview of the NIST Program . . . . . . . . . . . . . . . . . . . . .2 2.1 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 2.2 Acceptance Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2.2.1 Dimensional Tolerances . . . . . . . . . . . . . . . . . . . . .3 2.2.2 Impact Energy Requirements . . . . . . . . . . . . . . . . .3 2.2.3 The Direction in Which the Specimens Leave the Machine During Impact Testing . . . . . . . .4 3. Machine Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 4. Direct Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 5. Indirect Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 5.1 Post-Fracture Examination . . . . . . . . . . . . . . . . . . . . . . . .9 5.1.1 Worn Anvils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 5.1.2 Off-Center Specimen . . . . . . . . . . . . . . . . . . . . . . .11 5.1.3 Off-Center Striker . . . . . . . . . . . . . . . . . . . . . . . . .12 5.1.4 Uneven Anvil Marks . . . . . . . . . . . . . . . . . . . . . . .12 5.1.5 Chipped Anvils . . . . . . . . . . . . . . . . . . . . . . . . . . .13 5.1.6 Anvil Relief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 5.1.7 Damaged Anvils . . . . . . . . . . . . . . . . . . . . . . . . . .14 5.1.8 Bent Pendulum . . . . . . . . . . . . . . . . . . . . . . . . . . .15 6. Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 7. Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17