Solid solution strengthening in polycrystals of Mg–Sn binary alloys

Effects of grain size and heat treatment on the tensile properties of Mg–3Nd–0.2Zn (wt%) magnesium alloys

“…The ultimate tensile strength, 0.2% proof stress (referred to as yield strength), and elongation of specimens were determined from the test data. According to the Consid ere criterion [3], the global tensile instability of a material without internal damage occurs when the strain hardening rate (ds/de) becomes equal to the flow Table 1 Parameters for the Hall-Petch equation, s 0.2 ¼ s 0 þ kd À 0.5 , as given in [12][13][14][15][16][17][18][19][20].…”

“…Heat-treatment (temperature/time) k Solution Age MPamm 1/2 [12] Pure Mg --6.9 [13] Pure Mg-extrusion --4 [13] Pure Mg-rolling --9.2 [14] AZ91-squeeze cast 420 1C/16 h 205 1C/4 h 39.5 [15] AZ91-gravity cast 460 1C/20 h 205 1C/4 h 15 [16] AZ91-sand-cast Undefined Undefined 19 [17] Mg-6Al-1Zn-extrusion --11 [18] Mg-9Al-1Zn-extrusion --7.8 [19] Mg stress s, and the corresponding critical strain e i , when global instability takes place, is equal to the strain-hardening exponent, n. The Hollomon equation (s¼Ke n ) was assumed to represent the stress-strain curves of magnesium alloys in plastic deformation stage, and the strain-hardening exponent (n value) was determined from a linear fit to the log true stress-log true strain data over a strain range from about 0.01 up to instability [3].…”

“…Several studies have been conducted to understand the grain size strengthening in Mg alloys [12][13][14][15][16][17][18][19][20], as shown in Table 1. The values for experimental k-values derived from these reports range from 4.42 to 39.5 MPa mm 1/2 .…”

Effects of yttrium and zinc on the texture, microstructure and tensile properties of hot-rolled magnesium plates

“…In this case, the basal slip is easy to operate, leading to lower YS in the Mg-Y specimens. Previous research [26][27] showed that the strengthening of the basal plane controlled the yield strength (or solid solution strengthening) of polycrystalline Mg-Sn [26] and Mg-Al solid solutions [27]. However, higher values of YS were found for the Mg-Y alloys than pure Mg and the Mg-1Zn alloy, in spite of a lower YS of the 1Y alloy than that of the 1Zn alloy.…”

Effect of the Mean Size of Fine Intermetallic Compounds on the Strength Property of Sintered Magnesium Alloy by Gas Atomization

“…The tin content increased with the increasing sintering temperature in comparison to the atomized powders. That is, the grain boundary and Mg 2 Sn compound decreased, and the solid solution strengthening would occurred 11,12) . of the magnesium alloy process will be increased.…”