Threshold creep behaviour of discontinuous aluminium and aluminium alloy matrix composites: An overview

Analysis of creep behavior of SiC/Al metal matrix composites based on a generalized shear-lag model

“…[2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Morimoto et al 2 found that the higher volume fraction and the larger aspect ratio of reinforcement resulted in an increased creep resistance of SiCw/2124Al composite. Nieh et al 3 found that the creep behavior of SiC/Al composite shows minimum creep rate without showing welldefined steady-state creep region.…”

Review on Creep Analysis and Solved Problems

“…Unlike several difficulties of the experimental methods such as complexity of them (they may be time-consuming, expensive and intricate), they are useful to predict the steady state creep behaviors [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]. For instance, the second-stage creep behavior of the composite "SiC/Al6061" was experimentally and analytically analyzed by Morimoto et al [36], in which happening of the non-aligned fibers and creation of the microcracks in the creeping composite are some difficulties during the experimental process.…”

Three Regions of Dislocation Creep in <I>In Situ</I> TiB Fiber-Reinforced &alpha;-Titanium Matrix Composite

“…high values of apparent stress exponent and activation energy, has been widely accepted in Albased MMCs [13][14][15][16][17][18] fabricated using powder metallurgy (P/M), similar to dispersion strengthening alloys such as TD-Ni 10, 11) * Graduate Student, University of Tokyo. E-mail address: kawabata@materials.isas.ac.jp and some Al alloys.…”

“…The understanding of the contribution of the reinforcements in strengthening the composite materials in creep, in particular under steady-state condition, has been established in the following two ways: the load transfer concept [1][2][3][4][5][6][7][8][9] based on continuum mechanics and the threshold stress concept [10][11][12][13][14][15][16][17][18] based on dislocation theory.…”

“…The interaction has been interpreted by the Orowan mechanism 20) or the void strengthening mechanism, 21) and the latter is, now, believed to operate at high temperatures. 12) In P/M Al-based MMCs, [13][14][15] a large threshold stress is generated by uncontrolled fine oxides introduced through the processes. The effect of the coarse reinforcements on the creep resistance has been only discussed via estimation of the effective stress, defined as the applied stress minus the threshold stress.…”