Environmental influence on the stress corrosion cracking of rock bolts

被引：109
作者：
Gamboa, E [1 ]
Atrens, A [1 ]
机构：
[1] Univ Queensland, Div Mat, Brisbane, Qld 4072, Australia
来源：
ENGINEERING FAILURE ANALYSIS | 2003年 / 10卷 / 05期
基金：
澳大利亚研究理事会;
关键词：
stress corrosion cracking; rock bolts; fracture; steel; Linearly Increasing Stress Test (LIST);
D O I：
10.1016/S1350-6307(03)00036-0
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In order to understand rock bolt Stress Corrosion Cracking (SCC), a series of experiments have been performed in Linearly Increasing Stress Test (LIST) apparatus. One series of experiments determined the threshold stress of various bolt metallurgies (900 MPa for Steel A, and 800 MPa for Steel B and C). The high values of threshold stress suggest that SCC begins in rock bolts when they are sheared by moving rock strata. Typical crack velocity values have been measured to be 2.5 x 10(-8) m s(-1), indicating that there is not much benefit for rock bolt steel of higher fracture toughness. Another series of experiments were performed to understand the environmental conditions causing SCC of steel A and galvanised Steel A rock bolt steel. SCC only occurred for environmental conditions for which produce hydrogen on the sample surface, leading to hydrogen embrittlement and SCC. Fracture surfaces of LIST samples failed by SCC were found to display the same fracture regions as fracture surfaces of rock bolts failed in service by SCC: Tearing Topography Surface (TTS), Corrugated Irregular Surface (CIS), quasi Micro Void Coalescence (qMVC) and Fast Fracture Surface (FFS). Water chemistry analysis were carried out on samples collected from various Australian mines in order to compare laboratory electrolyte conditions to those found in underground mines. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码：521 / 558
页数：38
相关论文
共 14 条
  • [1] LINEARLY INCREASING STRESS TEST (LIST) FOR SCC RESEARCH
    ATRENS, A
    BROSNAN, CC
    RAMAMURTHY, S
    OEHLERT, A
    SMITH, IO
    [J]. MEASUREMENT SCIENCE AND TECHNOLOGY, 1993, 4 (11) : 1281 - 1292
  • [2] Atrens A, 1995, MATER FORUM, V19, P9
  • [3] Beer FP, 1992, MECH MAT
  • [4] Crosky A., 2002, FINAL REPORT PREMATU
  • [5] CROSKY A, 2002, INT C EXH FAIL AN IC
  • [6] GAMBOA E, IN PRESS J MAT SCI
  • [7] GAMBOA E, 2002, P 15 INT CORR C GAN, P1
  • [8] GAMBOA E, 2002, P INT C HYDR EFF MAT
  • [9] Hydrogen embrittlement failure of hot dip galvanised high tensile wires
    Mukhopadhyay, NK
    Sridhar, G
    Parida, N
    Tarafder, S
    Ranganath, VR
    [J]. ENGINEERING FAILURE ANALYSIS, 1999, 6 (04) : 253 - 265
  • [10] HYDROGEN EMBRITTLEMENT OF PEARLITIC STEELS - PHENOMENOLOGICAL STUDY ON NOTCHED AND PRECRACKED SPECIMENS
    TORIBIO, J
    LANCHA, AM
    ELICES, M
    [J]. CORROSION, 1991, 47 (10) : 781 - 791
12