Chapter 198: Chapter 191: The Weakest Edge
By the tenth day of the Arsenal Clock, the first curved layered-armor section lay beneath Titanworks’ inspection lamps.
A hatch outline had been marked across its upper third. Twelve bolt positions followed the lower curve. A separate strip from the same batch waited beside the welding table.
The heavy stamping press had proven that layered armor could be shaped.
Now the section had to survive becoming part of a tank.
Ironbreaker stood beside the plate while Brakka checked the measurements against the quarter-scale turret drawing. Sera reviewed the work order with the machinists and welders.
Maerath and Gandalf prepared the mana-measuring frame.
The earlier flat sample had failed around a single drilled hole. This time, Maerath had marked shallow channels around the hatch outline and half the bolt positions. The channels were meant to redirect mana pressure around the openings instead of letting it collect at their edges.
Brakka studied the markings.
"You are cutting paths into armor."
"I am preventing the mana from cutting its own."
"The channels remove material."
"So do holes."
"Holes are necessary."
"So are the channels."
Ironbreaker looked between them.
"If the channels weaken the plate, they go."
Maerath nodded.
"And if the unchannelled holes fail again, I expect equal enthusiasm in the report."
Sera opened the ledger.
"I promise to record everyone’s disappointment accurately."
The curved section was secured beneath Titanworks’ largest milling frame. The adjustable bed held the quarter-scale piece without flattening its curve.
The lead machinist lowered the cutter.
"Depth set."
Ironbreaker checked the clamps.
"Slow speed."
The machine engaged.
Metal fragments fell into the collection tray as the cutter followed the first side of the hatch outline. Gandalf watched the mana crystal while Maerath tracked the flow through the outer layer.
The first straight cut remained stable.
At the corner, the crystal brightened.
"Stop," Maerath said.
The cutter halted.
A thin blue-white line lingered along the fresh edge before fading.
Brakka tapped the corner with his testing rod.
"No crack."
"Mana is gathering where the cutter changes direction," Gandalf said.
Maerath pointed toward the marked channels.
"They need to be opened before the hatch is finished."
Ironbreaker nodded.
"Do it."
The machinist changed tools and cut the shallow channels first. They passed only through the mana-rich surface layer, deep enough to redirect flow without reaching the steel base.
When the main cutter resumed, the second corner produced a smaller rise.
The third produced less.
At the fourth, the mana field divided around the opening instead of collecting against it.
The final cut released the hatch section.
The exposed edge showed all three layers clearly: mana-rich outer metal, transition material, and high-strength steel beneath.
No visible separation crossed the cut.
Brakka tapped around the opening.
The note remained even until he reached the first corner, the one cut before the channels had been opened.
The sound changed.
"Mark it."
Gandalf moved the crystal over the same point.
"Small stress knot."
Maerath looked at the remaining corners.
"And none here."
The hatch opening had not passed perfectly.
It had still proven the channels worked.
The bolt-line test came next.
Six holes remained ordinary. Six received shallow circular channels around their edges. The machinists drilled them in alternating order so heat would not collect along one side.
The ordinary holes disturbed the mana field immediately.
Nothing cracked during drilling, but pressure bent sharply around each opening.
The channelled holes remained calmer.
The difference became clearer once the section was fastened to the quarter-scale support frame.
The machinists tightened all twelve bolts to the provisional load.
Narrow pressure rings appeared around the ordinary holes.
The channelled holes showed none.
Brakka checked the fit.
"Both sets are holding."
"For now," Maerath said.
Ironbreaker looked toward the loading rig.
"Begin compression."
The frame applied pressure from behind the armor, simulating hull flex and repeated movement.
At the first stage, nothing changed.
At the second, one ordinary hole began to deform.
At the third, a faint split appeared beneath the outer layer beside the same bolt.
The test stopped.
All six channelled holes remained intact.
Sera entered the result.
Ordinary bolt openings: edge deformation and concentrated mana stress under load.
Channelled bolt openings: stable through provisional pressure.
Brakka examined the failed hole.
"The channel protects the mana layer. It does nothing for the steel beneath the bolt."
"No," Maerath said. "The physical load still needs a reinforced collar."
Ironbreaker nodded.
"Then the final pattern uses both."
A shaped collar would spread force through the steel base. The mana channel would protect the outer layer.
Neither solution was enough alone.
Together, they might be.
The welded joint remained.
The separate layered strip was clamped against the right edge of the curved armor section.
Brakka had proposed a stepped joint. The steel bases would meet first. The transition layers would overlap across a narrower second seam. The mana-rich outer layers would be joined only after the lower metal cooled.
Maerath had approved the plan without argument.
Brakka distrusted that more than disagreement.
"You agree?"
"I reserve the right to become disappointed later."
Sera turned toward the welders.
"Base seam first. Keep the heat below the second marker. Stop if the outer layer starts carrying it."
The welder lowered his shield.
The joining metal entered the stepped base while the assistant controlled the heating runes around the frame. The runes did not perform the weld. They only prevented one side from cooling faster than the other.
The base seam closed cleanly.
The transition seam followed.
Halfway along the joint, Gandalf’s crystal brightened.
"Mana rising along the weld."
Maerath leaned closer.
"The transition layers are drawing it into the molten seam."
Brakka watched the joint.
"Can the weld continue?"
"Yes," Maerath said. "But the seam will carry more mana than the surrounding plate."
"That sounds useful."
"It may also become brittle after repeated heating."
Ironbreaker made the decision.
"Finish it. We need the result."
The outer layers received the final seam after the lower sections cooled.
Visually, the weld looked clean.
Ironbreaker disliked clean-looking failures most of all.
Brakka struck the lower edge with his testing rod.
The base sounded solid.
At the transition seam, the note sharpened.
Maerath’s crystal confirmed the problem.
A narrow mana-rich band had formed along the weld.
Sera marked the location.
"Impact test."
The section returned to the frame.
The first strike landed away from the seam.
The plate held.
The second struck beside the weld.
A small dent appeared, but the joint remained closed.
The third landed directly across it.
A line formed in the outer layer.
The fourth extended it.
Maerath stopped the test.
The crack had not entered the steel base.
It followed the mana-rich band created by the weld.
Gandalf checked the earlier heat record.
"The transition layer absorbed too much mana while molten."
Brakka studied the seam.
"Physically, it held."
"Magically, it created a fracture path," Maerath replied.
That made the failure worse than an obvious break.
A normal inspection might have approved the joint. The weakness appeared only after repeated impact and mana loading.
Sera entered the result.
Stepped welded joint: physical bond acceptable.
Mana concentration formed along transition seam.
Outer-layer cracking initiated under repeated stress.
Joint rejected for armor service.
The hall quieted.
The hatch had mostly succeeded.
The channelled bolt holes had succeeded at sample scale, though reinforced collars were still required.
The weld had failed.
The steel had joined.
The magical layers had joined too well in one narrow band.
Maerath traced the crystal along the crack.
"We need to interrupt the concentration."
Brakka studied the stepped edge.
"Use a lower-mana filler."
"That reduces resistance along the seam."
"Better a controlled weak point than a brittle one."
Gandalf examined the cut samples.
"Or stagger the transition welds instead of forming one continuous path."
Ironbreaker considered it.
"A segmented seam would distribute heat and stop one uninterrupted mana channel."
Sera added another possibility.
"Mechanical interlock beneath the weld. If the outer seam cracks, the plates remain connected."
Brakka nodded.
"Tongue-and-groove base. Staggered transition welds. Replaceable outer joining strip."
Maerath looked at him.
"That is three solutions."
"You complained when I disliked complexity."
"I am appreciating your growth."
Brakka gave him a flat look.
Ironbreaker ended the exchange.
"We test them separately before combining anything."
The next sequence was fixed.
First, a tongue-and-groove steel base without magical filler.
Second, staggered low-mana transition welds.
Third, a replaceable outer strip designed to redirect mana around the joint.
The current section would remain intact long enough to preserve the evidence. Its successful hatch opening and channelled bolt holes would continue into later tests. The failed weld would be cut only after every layer had been mapped.
Sera updated the test board.
Machined hatch opening: conditionally accepted.
Channelled bolt pattern: accepted with reinforced collars required.
Welded joint: rejected.
The heavy stamping press had produced the first usable curve.
Machining had not destroyed it.
The joint between plates had become the new limit.
The full report reached Elarion that evening.
Lucien reviewed the hatch map, bolt deformation, and mana concentration along the failed weld.
The System updated the branch.
Heavy Armor Integration Research Updated
Curved armor machining: partially validated.
Mana-flow channels around openings: effective at sample scale.
Bolted connection requires reinforced load distribution.
Welded layered-armor joint: failed.
Next required development: segmented joint architecture.
Ninety-Day Review: 80 days remaining.
Arsenal Before the Breach: 2 years, 355 days remaining.
Lucien approved the next joint trials.
