HAZ

The results show that the welding thermal-cycle on its mechanical property of the HAZ has no evidence effect.

The weld section looks like an inverted trapezia and the heat affect zone (HAZ) is very narrow.

Fibrous processing marks remain in the heat-affected zone (HAZ) with part of precipitated solid phase solved into the base metal.

The microstructure of weld bead obtained by shielded metal arc welding are massive ferrite and a little pearlite, HAZ are lath bainitic.

The microhardness distribution of the welded joint is along the welding line. The microhardness is higher in nugget zone, and lowest in HAZ.

high strength pipeline steel pipes and its welding HAZ shall have well properties of low temperature toughness and site girth welding.

This paper discussed the effects of Nb on the HAZ structure and properties of ultra-fine grained steel formed by the deformation inducement.

The HAZ will have O temper annealed properties for non-heat-treatable alloys regardless of the initial material temper.

the HAZ was martensite and a small amount of residual austenite.

The dominant nucleation mechanism of IAF in HAZ of different micro-alloyed series was not the same as each other.

The results indicated that excellent low temperature toughness and lower FATT could be obtained under different welding conditions in HAZ.

The grain distribution and heat pining of grain growth in the welding HAZ. Different influence were predicted by different heat input .

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Fracture toughness of heat affected zone (HAZ) was between the base metal and weld metal.

The test result shows that jointer weld is typically ferrite and pearlite structure, HAZ contains side strip ferrite.

On the basis of the microhardness variation, the HAZ is divided into five subregions .

With the increase of yield strength, the longitudinal residual stress of HAZ increases.

The hardness of the weld zone is higher than that of matrix and the hardness of heat affected zone(HAZ) is lowest.

declining of mechanical performance in welding seam and welding heat affected zone(HAZ) etc.

The microhardness of weld metal zone, HAZ and base metal decrease in totality after heat treatment.

Toughness distributions of different area on HAZ of grade X80 pipeline steel have been studied.

Both FZ and HAZ have higher microhardness than the base metal has, and microhardness in fusion centre zone is the lowest.

There ate a small amount of martensite in HAZ, and distributed in gradient.

The micro-structure of fracture surface of HAZ is of granular bainite, with characteristics of coarse crystal zone.

It was shown that the impact toughness of HAZ is 50% of base metal.

Too slow a cooling rate can result in a soft HAZ and thus a loss of tensile and fracture toughness properties.

The results show that dislocation starts to glide in HAZ.

Any arc welding process gets the HAZ much hotter than this.

The actual welding test show that the grain size number in HAZ is above NO. 6.

Four kinds of welding joints all have good low-temperature impact toughness except HAZ on 1. 4003 side.

Impact Charpy toughness and local brittleness of HAZ of X80 line pipes made in China were studied.

Prediction of HAZ tribological properties of fusion welded zinc-based alloy by means of artificial

Flow behaviors of HAZ-softened weld joint and prediction of its tensile strength

Effect of welding thermal cycle on HAZ microstructure and mechanical properties of copper-bearing age-hardening steels

Study on HAZ microstructure and impact properties in high strength shipbuilding steel plate

Effect of simulated welding thermal cycle on microstructure and properties of HAZ for micro-calcium steel

Narrowing HAZ During Induction Heating for Friction Welded Joints of High Strength Steel

Monte carlo computer method for simulating microstructure evolution in HAZ of welds

Modeling and experimental study on HAZ grain growth in laser welding of ultra-fine grained steel

Microstructure simulation in the HAZ of industrial pure aluminum

Effect of Center Segregation on Impact Property of Continuous Casting Steel and HAZ

Study on the Microstructures and Toughness in Simulative Welding HAZ of Microalloyed Steel

Strength and deformation in HAZ-softened welded joints

Built HAZ Induration Element Prediction System of Pipeline Steel Weld

Weld HAZ Heat Simulating Structure and Impact Toughness of 2205 Dual Phase Stainless Steel

Simulation of grain growth in the HAZ of industrial pure aluminium

Research on microstructure and property of HAZ of 20 # pipeline steel in-service welding

A New Method on Avoiding HAZ Cold Cracks of Steel Underwater Wet Welding

The Effect of Mechanical Vibration Welding on the Microstructure of Weld and HAZ

Computing Model of HAZ Austenite Grain Growth

Effect of second -phase particle on austenite grain size in HAZ in microallyed steel

Effect of HAZ Yield Strength on Plastic Zone at Cracking Tip

Study on Impact Toughness of HAZ in Ultra-Low Carbon Bainitic Steel

The Effect of Heat Pipe on the Thermal Cycle During Welding and HAZ

Fig. 1 The chart of multi-pass welding HAZ of pipeline steel