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In order to obtain high strength of welded cruciform joints, the best way is to grinding the weld to obtain an inward curving form.
Stress concentration factors and fatigue behaviour of welded thin walled CHS-SHS T-joints under in-plane bending[J].

Ti3AlC2 powder has been synthesized by self-propagating high-temperature synthesis (SHS) [3-4].
The tensile surface of the samples was polished with diamond paste down to 1µm and the corners were rounded with a 15mm diamond-grinding wheel.

Fig.1 shows the principle diagram of self-reactive quenching technology, Agglomerate powder powders are sprayed through the self-propagating flame spray gun accompanying the self-propagating high-temperature synthesis (SHS) reactions during the whole process in the flame field.
According to the reactive mole ratio, agglomerate powder powders are prepared by milling, mixing, drying, carbonation , grinding and sieving process.
Put the raw materials into the ball mill; take anhydrous ethylalcohol as the medium sphere to grind 6h, and adding epoxy resin to stir 2h .Then the agglomerate powder powders are made by drying, carbonation), grinding and sieving process.

The power system has been equipped with more than 3,000 coal mills, grinding coal amounted to 400 million t / h per year.
Its basic principle is the combination of combustion synthesis (SHS) and centrifugal casting technology and using a thermite reaction Fe2o3 + 2AL -------> 2AL2O3 +836kj / mot to release heat above 300 ℃.

Up to now, a number of researchers have successfully prepared Ti2AlC and Ti3AlC2 materials by various methods, such as hot isostatic pressing (HIP), self-propagation high-temperature synthesis (SHS), combustion synthesis (CS), hot pressing (HP), and spark plasma sintering (SPS) [2-4].
The mechanical milling was carried out in a planetary high-energy ball mill at argon protective atmosphere, with chromium steel grinding balls (10 mm in diameter) being used as milling media.

One of the ways to obtain MAX-phases is self-propagating high-temperature synthesis (SHS), which significantly reduces energy consumption and simplifies production of MAX-materials [3-5].
One of the ways to purposefully influence powder mixture for SHS is mechanical activation (MA), which allows you to realize an ideal contact between reagents and increase reactivity of mixture.
Mechanical activation of all compositions leads to an increase in diffuse background, a decrease in intensity of diffraction reflections of mixture components, a broadening of peaks, which indicates the presence of non-equilibrium defects in grinding products and a decrease in size of crystallites.

Especially, TiC has been widely used for manufacturing hard alloys, cutting tools and grinding wheels as it some unique properties which includes high melting point, high hardness, and low density.
Several methods have been reported for synthesizing TiC powders, such as direct carburization process by reaction between Ti and C, gaseous pyrolysis of TiCl4 in a carbon containing atmosphere and self-propagating high temperature synthesis (SHS) through exothermic reaction [4].

Using an instrumental microscope, parameters ∆h, c, li were determined and “depth of occurrence” of a measurement point was calculated using the formula: zi=c-lic∆h, (2) where zi – "“depth of occurrence" ” of a i-th measurement point, mm; ∆h – difference in sample thickness before and after grinding, mm; c – distance from the first measuring point to the sample edge, mm; li – distance from a i-th measuring point to the sample edge, mm.
Safronov NN, Mingaleeva LB, Savin IA (2018) Optimization of charge material composition in SHS process with ferrosilide fabrication from gaseous wastes of metallurgical production.
Savin. , Optimization of charge material composition in SHS process with ferrosilide fabrication from gaseous wastes of metallurgical production. (2018) , Chernye Metally, . (2) (2018)pp. 53–-59

After the epoxy was hardened, the surface of the specimens was smooth by using grinding wheel with diamond cutter.
Grzebieta, Plastic mechanism analysis of concrete-filled double-skin (SHS inner and SHS outer) stub columns, Thin-Walled Struct. 40 (2002) 815–33

The powder particles, with variation on ball-mass-to-powder-mass ratio, are subjected to severe mechanical deformation from collisions with the grinding media, and are repeated deformed, cold-welded and fractured.
On the other hand, the reaction trigged by MA to form PbTe is similar to combustion synthesis or self-propagating high-temperature synthesis (SHS) [28], which involves the spontaneous formation of a compound by an exothermic reaction.
Also for compacted powder pellets, it has been reported that the propagation of SHS is easy when the particle size is small, but became difficult and eventually impossible as the particle size increased [32].