The principle of using crack-cutting holes in increasing the fatigue life of welding components is analyzed in the paper.

Study on fatigue repair with stop hole techniques;

Crack tip opening angle and its application to crack arrest in gas pipeline;

Oblique crack arrest of super hardness aluminium alloy specimens by pulse current discharge

It is reviewed that research achievement of pipeline cracks arrest,It shows that the formula of pipeline crack arrest in 1970s was inclined to danger for determining cracks arrest behavior of high toughness pipeline through objects test.

The certain method of transfer gas pipeline crack arrest ductility is discussed and analysised,and respective merits and faults is listed.

For the West-east pipeline project to be put into construction,the problems in technology first to be solved are the fracture arrest of pipeline.

There are many instances where fluid pressure acting on the structure caused the structure to cracking and the cracks could be propagated rapidly or arrestded,which is regarded as the most advanced research field in dynamic fracture.

Experimentation and numerical simulation analysis on half-embedding crack preventing in metal die of 9Cr2 steel using electromagnetic heating;

The crack preventing has been obtained around the quenching crack tip inside cavity die of 9Cr2 steel through the pulse current discharge and .

The experdriental results show that the crack preventing fora current conductor with cracks by the heat effect of electro-magnetic not only is feasible, but also has many advantages,such as keeping outside force, simplicity, efficiency, and im-proving toughness and so on.