grain-to-grain stress
1.To change the grain increase method we must first carry out reform, optimize the industrial structure and farming system, stress scientific management, enhance the level of intensive farming in grain production and raise the utilization rate of agricultural resources. The most important thing is to rely on progress in science and technology, step up efforts to develop grain production by relying on science, technology and education and concentrate on high yields, high quality, high efficiency and low consumption.
4.Main deforming mechanism for magnesium superplasticity was still grain boundary sliding(GBS),which ought to be accommo dated by additional deforming mechanism when stress concentration occurred at triangular grain bound aries junction,or at the interface between the strengthening phase and the matri x in magnesium-based composites.
5.THE EFFECT OF PRIOR AUSTENITE GRAIN SIZE UPON THE SUSCEPTIBILITY OF 40CrNiMoA STEEL TO STRESS CORROSION CRACKING AND CORROSION FATIGUE IN DISTILLED WATER
6.The results show that after 1190~ 1200℃/120-160 MPa/3-4h HIP and 1180℃/4h+ 980℃/6h heat treating, the mid-temperature mechanical properties including the tensile and rupture-stress as well as the low cycle fatigue of the fine grain cast K403 alloy were improved greatly. At the same time,the high temperature stress rupture property was about equal to conventional cast.
