美陆军武器研究发展与工程中心贝内实验室经研究测定认为,A723高强度钢火炮身管寿终失效的原因在于应力腐蚀裂纹。105mm火炮身管炮口端部的裂纹是由于身管发射产物和残余拉伸应力所致。裂纹呈径向源于内膛阳膛线的棱边处,并同时沿径向和圆周方向扩展,其路径通常呈沿晶走向。过去三种类型的测定研究曾指出,对于屈服强度 The United States Army Weaponry Research and Development and Engineering Center Bayne laboratory determined that the A723 high strength steel barrel end of life failure due to stress corrosion cracking. Cracking of the 105mm gun barrel end of the muzzle is due to the tube firing product and residual tensile stress. Cracks radial from the breech of the rifling edge of the breech at the same time along the radial and circumferential direction of expansion, the path is usually along the grain along the crystal. The past three types of assay studies have pointed out that for yield strength