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Despite the considerable number of studies on the Chongqing Pb-Zn district over the last decades, there is no consensus about the genesis of these deposits in the Yunnan-Chongqing-Guizhou Pb-Zn metallogenic region.
Galena is present as fine- to coarse-grained, anhedral granular aggregates, generally coexists with sphalerite, pyrite, and calcite.

And thus, lead to a sound joint without high-angle grain boundaries [2].
Quantity of micropore reduces with the increase of instance from A area and thus form a large number of shallow and small dimples in the cleavage plane.

The vacuum condition can prevent or limit the oxidation and the fast heating rate along spark and plasma condition can help to control the reactions between Mg and other phases including suppressing coarse growth of formation phases and crystal grains [3-5].
A large number of hole-like defects (voids) can be seen in Fig.5 (a).

Larger numbers of stalks used as building materials can not only handle stalks for increasing farmers' income, but also provide plenty of construction raw materials.
Table 2 Test results of river sand performance Apparent density [g/m3] Bulk density [kg/m3] Voidage P′[%] Grain composition Degree of thickness 2.56 1560 40 The second district, grading qualified Mx=2.4，medium sand Cement. 42.5# Portland cement, origin: Zhangjiakou.

At the same time, in the reference copper sample, a significant grain growth is observed from 10-30 microns in the initial state to 40-170 microns.
The results of the point energy dispersive analysis after heat treatment 570 °C, 3 hours (Fig. 2) Point number Element Weight [%] Atomic [%] Accuracy [%] Phase 1 Al 45.77 66.53 5.95 CuAl2 Cu 54.23 33.47 4.56 2 Al 93.48 97.13 2.27 Al Cu 6.52 2.87 13.79 3 Al 62.03 79.37 4.98 CuAl2 Cu 37.97 20.63 5.22 Fig. 3.

Based on the sediment continuity equation (Eq. (4)), the bed level change dz/dt can be obtained in a number of ways [12]
Input parameters used are bathymetry data, water surface elevation, wind, wave, current, and grain size of sediment.

A number of high temperature applications of austenitic cast steels involve cyclic conditions.
The scale seems to be adherent and consists of fine grains uniformly dispersed throughout the surface.

Besides modifying the eutectic silicon, it can form a fine dispersion of coherent intermetallic compounds which strengthen the grain boundaries, increasing the strength o f the Al-Si alloys at elevated temperatures.
Acknowledgements This research is funded by Fundamental Research Grant Scheme (FRGS), Vot number 1422, Ministry of Education.

Simulations of thermal cycles are described by mathematical relations and complex analytical functions [3, 4 and 5], and they have a number of specific parameters such as: - Peak temperature, Tv in °C - Cooling time from 800°C to 500°C, t8/5 in s - Heating and cooling rate Experimental procedure The material tested in this study is a 22 mm thick plate of the steel P355NH.
Farbas N., Kurtag A., - Simulation of thermal cycles in steel welding, 1, 3 MoDV, Machine Construction, no. 9, Bucharest, 1978 (in Romanian) [5] Pascu D.R. – The influence of structural factors on the technological characteristics and mechanical properties of low alloyed construction steel subjected to post-welding heat treatments, PhD Thesis, 1983 [6] SR EN 10028-3 – Flat products made of steels for pressure purposes – Part 3: Weldable fine grain steels, normalized

The plastic part of velocity gradient is the sum of the slip deformation of all slip and twinning systems as . (2) Here and are the slip/twin plane normal and slip/twin direction vectors, respectively, is the shear strain rate, and is the number of slip and twinning systems.
A typical rolling texture of magnesium [8], in which the c-axes of the crystal grains inclined almost parallel to the normal direction to the specimen, is used.