Views
2 weeks ago

SUMMER 2020

  • Text
  • Distributors
  • Continued
  • Solutions
  • Products
  • Zinc
  • Marking
  • Screws
  • Stainless
  • Fasteners
  • Fastener
Distributor's Link Magazine Summer 2020 / Vol 43 No3

14 THE DISTRIBUTOR’S

14 THE DISTRIBUTOR’S LINK Rob LaPointe AIM TESTING LABORATORY Rob LaPointe is a noted authority in materials and fastener technology. With extensive experience in the management and science of materials testing laboratories combined with master’s degrees in physics and education, he excels at bringing solutions to the client. Working specifically in the fastener testing industry, he has developed expertise in mechanical, nondestructive, metallurgical and chemical testing. With a background of 20 years in physics education, Rob is effective at communicating complex ideas in a simple and understandable manner, communicating well with clients enabling them to make informed decisions about their products and business. AIM is located at 1920 Cordell Court #101, El Cajon, CA, 92020. Tel: 909-254-1278, email: sales@aimtestlab.com or online at www.aimtestlab.com FASTENER SCIENCE: CHARPY IMPACT TESTING Charpy impact testing is the most fundamental test to determine the fracture toughness of metal. It is both simultaneously a brutish and eloquent test, striking a metal bar with a big hammer so that it breaks into two pieces. On the eloquent side, the test makes use of a simple mechanism that uses the force of gravity on a falling pendulum and fundamental physics to determine the amount of energy consumed by the fracturing specimen. Charpy impact testing, also known as Charpy V-notch (CVN) was first developed by S.B. Russell in 1896, although Russell’s initial tests were done on bars of metal without a notch. In 1901, Georges Charpy introduced the notched specimen (Figure 1) and test standardization with both the specimen and the impact tester (Figure 2). Charpy’s contributions to standardize both the specimen and testing apparatus enabled the test results to characterize materials and tempering techniques and to compare the fracture toughness among them. Charpy’s contributions to the science of the test were so significant, the test was named after him. FIGURE 1 CHARPY V-NOTCH (CVN) SPECIMEN TECHNICAL ARTICLE FIGURE 2 CHARPY IMPACT TESTING MACHINE The testing specifications that govern test specimens and testing machines are specified in both ASTM E23 and ISO 148-1. Both specifications provide specimen geometry, testing machine tolerances and calibration parameters. The standard CVN bar is 10 x 10 mm square and 55 mm long (Figure 1). The V-notch is 45 ° and has a root radius of 0.25 mm. The geometry of the specimen has a tight tolerance so that the resulting energy measurement is comparable between the specimens in a test group as well as from one test to another on the same material and temper. A test group consists of three samples tested together. The purpose of the V-notch is to both direct the fracture to occur in the middle of the specimen in addition to providing a standardized stress-riser and fracture area. CONTINUED ON PAGE 104

  • Page 6 and 7: in the Summer 2020 issue of 6 DISTR
  • Page 8: 6 THE DISTRIBUTOR’S LINK LindFast
  • Page 12: 10 THE DISTRIBUTOR’S LINK Guy Ave
  • Page 26: 24 THE DISTRIBUTOR’S LINK Bruno M
  • Page 30: 28 THE DISTRIBUTOR’S LINK Jo Morr
  • Page 34: 32 THE DISTRIBUTOR’S LINK Del Wil
  • Page 41: THE DISTRIBUTOR’S LINK 35
  • Page 46: 40 THE DISTRIBUTOR’S LINK Jim Tru
  • Page 51 and 52: THE DISTRIBUTOR’S LINK 45 EFC Int
  • Page 54: 48 THE DISTRIBUTOR’S LINK PENN EN
  • Page 58: 52 THE DISTRIBUTOR’S LINK Nelson
  • Page 61 and 62: THE DISTRIBUTOR’S LINK 55 INTERCO
  • Page 64 and 65: 58 THE DISTRIBUTOR’S LINK GLOBALF
  • Page 66:

    60 THE DISTRIBUTOR’S LINK NATIONA

  • Page 69 and 70:

    THE DISTRIBUTOR’S LINK 63

  • Page 72:

    66 THE DISTRIBUTOR’S LINK METROPO

  • Page 76 and 77:

    70 THE DISTRIBUTOR’S LINK NEW ENG

  • Page 78 and 79:

    72 THE DISTRIBUTOR’S LINK INTERNA

  • Page 80:

    74 THE DISTRIBUTOR’S LINK DISTRIB

  • Page 84:

    78 THE DISTRIBUTOR’S LINK BRIGHTO

  • Page 88 and 89:

    82 THE DISTRIBUTOR’S LINK YOUNG F

  • Page 90:

    84 THE DISTRIBUTOR’S LINK NORTH C

  • Page 93 and 94:

    THE DISTRIBUTOR’S LINK 87 OBITUAR

  • Page 96 and 97:

    90 THE DISTRIBUTOR’S LINK EARNEST

  • Page 98:

    92 THE DISTRIBUTOR’S LINK PARKER

  • Page 101 and 102:

    THE DISTRIBUTOR’S LINK 95

  • Page 104:

    98 THE DISTRIBUTOR’S LINK LAURENC

  • Page 107 and 108:

    THE DISTRIBUTOR’S LINK 101

  • Page 110 and 111:

    104 THE DISTRIBUTOR’S LINK ROB La

  • Page 112:

    106 THE DISTRIBUTOR’S LINK BRUNO

  • Page 115 and 116:

    THE DISTRIBUTOR’S LINK 109

  • Page 117 and 118:

    THE DISTRIBUTOR’S LINK 111 Roy Me

  • Page 120 and 121:

    114 THE DISTRIBUTOR’S LINK LARRY

  • Page 122:

    116 THE DISTRIBUTOR’S LINK ANTHON

  • Page 125 and 126:

    THE DISTRIBUTOR’S LINK 119 3Q, In

  • Page 127 and 128:

    THE DISTRIBUTOR’S LINK 121

  • Page 130 and 131:

    124 THE DISTRIBUTOR’S LINK NELSON

  • Page 132 and 133:

    126 THE DISTRIBUTOR’S LINK FAB GR

  • Page 134:

    128 THE DISTRIBUTOR’S LINK LAUREN

  • Page 137:

    THE DISTRIBUTOR’S LINK 131 KEY BE

  • Page 141 and 142:

    fastenerlinks BRINGING YOU THE FAST

  • Page 143 and 144:

    fastenerlinks BRINGING YOU THE FAST

  • Page 146 and 147:

    140 THE DISTRIBUTOR’S LINK BRUNO

  • Page 148 and 149:

    142 THE DISTRIBUTOR’S LINK JOE DY

  • Page 150 and 151:

    144 THE DISTRIBUTOR’S LINK ROBERT

  • Page 152:

    146 THE DISTRIBUTOR’S LINK PENN E

  • Page 156 and 157:

    150 THE DISTRIBUTOR’S LINK LAUREN

  • Page 158:

    152 THE DISTRIBUTOR’S LINK ROB La

  • Page 161 and 162:

    THE DISTRIBUTOR’S LINK 155

  • Page 164 and 165:

    158 THE DISTRIBUTOR’S LINK LAUREN

  • Page 166 and 167:

    160 THE DISTRIBUTOR’S LINK LAUREN

  • Page 168 and 169:

    162 THE DISTRIBUTOR’S LINK LAUREN

  • Page 170 and 171:

    164 THE DISTRIBUTOR’S LINK LAUREN

  • Page 172 and 173:

    166 THE DISTRIBUTOR’S LINK LAUREN

  • Page 174:

    168 THE DISTRIBUTOR’S LINK LAUREN

  • Page 178:

    advertisers index A ACS MANUFACTURI

  • Page 182:

    advertisers index N NBS CORPORATION

SHARE A PAGE FROM THIS MAGAZINE

OPTION 1: Click on the share tab above, or OPTION 2: Click on the icon (far right of toolbar) and then click on the icon (top right of the page).

View Archives

SUMMER 2020
SPRING 2020
WINTER 2020
FALL 2019
SUMMER 2019
SPRING 2019
WINTER 2019
FALL 2018
SUMMER 2018
SPRING 2018
WINTER 2018
FALL 2017
SUMMER 2017
SPRING 2017
WINTER 2017
FALL 2016
SUMMER 2016
SPRING 2016
WINTER 2016
FALL 2015
SUMMER 2015
SPRING 2015
WINTER 2015
FALL 2014
SUMMER 2014
SPRING 2014
WINTER 2014
FALL 2013
SUMMER 2013
SPRING 2013
WINTER 2013
FALL 2012
SUMMER 2012
SPRING 2012
WINTER 2012
FALL 2011
SUMMER 2011
SPRING 2011
WINTER 2011

Copyright © Distributor's Link, Inc. All Rights Reserved | Privacy Policy